Update interface text to German for better user experience

Translate UI elements and messages from English to German across various components and pages, including video availability, loading states, and recommendations.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 051a65da-1176-4478-a61c-c662f2a15536
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/051a65da-1176-4478-a61c-c662f2a15536/9NQBiz8

client/src/components/bunny-video-modal.tsx

@@ -220,7 +220,7 @@ export default function BunnyVideoModal({ video, isOpen, onClose, onEdit, videos
                 />
               ) : (
                 <div className="absolute inset-0 flex items-center justify-center text-white">
-                  <p>Video not available</p>
+                  <p>Video nicht verfügbar</p>
                 </div>
               )}
               

client/src/components/video-grid.tsx

@@ -88,11 +88,11 @@ export default function VideoGrid({ videos, isLoading, hasMore, onLoadMore, view
             {isLoading ? (
               <>
                 <div className="animate-spin rounded-full h-4 w-4 border-b-2 border-white"></div>
-                <span>Loading...</span>
+                <span>Wird geladen...</span>
               </>
             ) : (
               <>
-                <span>Load More Videos</span>
+                <span>Weitere Videos laden</span>
                 <ChevronDown className="w-4 h-4" />
               </>
             )}