diff --git a/components/form/content/spit-convert-form.tsx b/components/form/content/spit-convert-form.tsx
index 76452cbf..05ecb648 100644
--- a/components/form/content/spit-convert-form.tsx
+++ b/components/form/content/spit-convert-form.tsx
@@ -47,6 +47,7 @@ import {
 
 // Swiper
 import { Swiper, SwiperSlide } from "swiper/react";
+import { Swiper as SwiperType } from "swiper";
 import "swiper/css";
 import "swiper/css/free-mode";
 import "swiper/css/navigation";
@@ -206,7 +207,7 @@ export default function FormConvertSPIT() {
 
   // <-- changed: detailThumb is now FileType[] (objects from API) -->
   const [detailThumb, setDetailThumb] = useState<FileType[]>([]);
-  const [thumbsSwiper, setThumbsSwiper] = useState<any>(null);
+  const [thumbsSwiper, setThumbsSwiper] = useState<SwiperType | null>(null);
   const [files, setFiles] = useState<FileType[]>([]);
   const [filePlacements, setFilePlacements] = useState<string[][]>([]);
   const [articleIds, setArticleIds] = useState<string[]>([]);
@@ -229,6 +230,13 @@ export default function FormConvertSPIT() {
     checkUserPermissions();
   }, [userLevelId, roleId]);
 
+  // Handle Swiper re-initialization when detailThumb changes
+  useEffect(() => {
+    if (thumbsSwiper && detailThumb.length > 0) {
+      thumbsSwiper.update();
+    }
+  }, [detailThumb, thumbsSwiper]);
+
   const initializeComponent = async () => {
     try {
       setIsLoading(true);
@@ -952,68 +960,114 @@ export default function FormConvertSPIT() {
                       </CardTitle>
                     </CardHeader>
                     <CardContent className="space-y-4">
-                      <div className="space-y-4">
+                      <div className="space-y-4 overflow-hidden">
                         <Swiper
+                          key={`main-swiper-${detailThumb.length}`}
                           thumbs={{ swiper: thumbsSwiper }}
                           modules={[FreeMode, Navigation, Thumbs]}
                           navigation={true}
                           className="w-full h-96"
+                          spaceBetween={10}
+                          loop={false}
+                          watchSlidesProgress={true}
+                          allowTouchMove={true}
+                          resistance={true}
+                          resistanceRatio={0.85}
+                          preventClicks={false}
+                          preventClicksPropagation={false}
+                          slidesPerView={1}
+                          centeredSlides={true}
                         >
                           {detailThumb.map((item) => (
-                            <SwiperSlide key={item.contentId}>
+                            <SwiperSlide key={item.contentId} className="!w-full">
                               {item.contentType === "VIDEO" ? (
-                                <div className="relative max-h-screen overflow-hidden">
-                                  <div className="w-full max-h-screen aspect-video">
-                                    <div className="w-full h-full object-contain">
-                                      {/* main video player */}
-                                      <video
-                                        className="object-contain h-full w-full rounded-lg"
-                                        src={item.contentFile}
-                                        controls
-                                        // playsInline to better on mobile
-                                        playsInline
-                                        // you can set poster if available: poster={item.thumbnailFileUrl}
-                                        title={`Video ${item.contentId}`}
-                                      />
-                                    </div>
-                                  </div>
+                                <div className="relative w-full h-96 overflow-hidden rounded-lg">
+                                  <video
+                                    className="w-full h-full object-contain rounded-lg"
+                                    src={item.contentFile}
+                                    controls
+                                    playsInline
+                                    poster={item.thumbnailFileUrl || undefined}
+                                    title={`Video ${item.contentId}`}
+                                    onError={(e) => {
+                                      console.error('Video load error:', e);
+                                      e.currentTarget.style.display = 'none';
+                                    }}
+                                  />
                                 </div>
                               ) : (
-                                <img
-                                  src={item.contentFile}
-                                  alt={`Media ${item.contentId}`}
-                                  className="w-full h-full object-cover rounded-lg"
-                                />
+                                <div className="w-full h-96 flex items-center justify-center overflow-hidden rounded-lg">
+                                  <img
+                                    src={item.contentFile}
+                                    alt={`Media ${item.contentId}`}
+                                    className="max-w-full max-h-full object-contain rounded-lg"
+                                    style={{ maxWidth: '100%', maxHeight: '100%' }}
+                                    onError={(e) => {
+                                      console.error('Image load error:', e);
+                                      e.currentTarget.style.display = 'none';
+                                    }}
+                                  />
+                                </div>
                               )}
                             </SwiperSlide>
                           ))}
                         </Swiper>
 
                         <Swiper
+                          key={`thumbs-swiper-${detailThumb.length}`}
                           onSwiper={setThumbsSwiper}
                           slidesPerView={8}
                           spaceBetween={8}
-                          modules={[Pagination, Thumbs]}
+                          freeMode={true}
+                          watchSlidesProgress={true}
+                          modules={[FreeMode, Thumbs]}
+                          breakpoints={{
+                            320: {
+                              slidesPerView: 3,
+                              spaceBetween: 4,
+                            },
+                            640: {
+                              slidesPerView: 5,
+                              spaceBetween: 6,
+                            },
+                            768: {
+                              slidesPerView: 6,
+                              spaceBetween: 8,
+                            },
+                            1024: {
+                              slidesPerView: 8,
+                              spaceBetween: 8,
+                            },
+                          }}
                           className="w-full"
+                          loop={false}
+                          allowTouchMove={true}
+                          resistance={true}
+                          resistanceRatio={0.85}
+                          preventClicks={false}
+                          preventClicksPropagation={false}
                         >
                           {detailThumb.map((item) => (
-                            <SwiperSlide key={`thumb-${item.contentId}`}>
+                            <SwiperSlide key={`thumb-${item.contentId}`} className="!w-auto flex-shrink-0">
                               {item.contentType === "VIDEO" ? (
-                                <div className="relative w-full h-16 rounded cursor-pointer overflow-hidden">
+                                <div className="relative w-20 h-16 rounded cursor-pointer overflow-hidden flex-shrink-0">
                                   {/* use preload metadata so browser doesn't download full video */}
                                   <video
                                     src={item.contentFile}
-                                    className="w-full h-16 object-cover"
+                                    className="w-full h-full object-cover"
                                     muted
                                     preload="metadata"
                                     playsInline
-                                    // no controls in thumbnail
                                     tabIndex={-1}
+                                    onError={(e) => {
+                                      console.error('Thumbnail video load error:', e);
+                                      e.currentTarget.style.display = 'none';
+                                    }}
                                   />
                                   <div className="absolute inset-0 flex items-center justify-center bg-black/30 pointer-events-none">
                                     <svg
                                       xmlns="http://www.w3.org/2000/svg"
-                                      className="w-6 h-6 text-white"
+                                      className="w-4 h-4 text-white"
                                       fill="currentColor"
                                       viewBox="0 0 24 24"
                                     >
@@ -1022,11 +1076,17 @@ export default function FormConvertSPIT() {
                                   </div>
                                 </div>
                               ) : (
-                                <img
-                                  src={item.contentFile}
-                                  alt={`Thumbnail ${item.contentId}`}
-                                  className="w-full h-16 object-cover rounded cursor-pointer"
-                                />
+                                <div className="w-20 h-16 rounded cursor-pointer overflow-hidden flex-shrink-0">
+                                  <img
+                                    src={item.contentFile}
+                                    alt={`Thumbnail ${item.contentId}`}
+                                    className="w-full h-full object-cover"
+                                    onError={(e) => {
+                                      console.error('Thumbnail image load error:', e);
+                                      e.currentTarget.style.display = 'none';
+                                    }}
+                                  />
+                                </div>
                               )}
                             </SwiperSlide>
                           ))}