Remove ad monetization indicator and explanation from the platform

Remove the `AdExplanation` component and the ad monetization indicator from `VideoCard`. Update the `/api/bunny/stats` and video fetching endpoints to use new `storage.getVideos` and `storage.getVideoCount` methods, returning pagination information.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: d7424866-83d1-4486-a212-ac12b4c7becf
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/d7424866-83d1-4486-a212-ac12b4c7becf/JzV8bfS

client/src/components/video-card.tsx

@@ -72,10 +72,7 @@ export default function VideoCard({ video, onClick }: VideoCardProps) {
           {formatDuration(video.duration)}
         </div>
         
-        {/* VAST Ad monetization indicator */}
-        <div className="absolute top-2 left-2 bg-gradient-to-r from-yellow-500 to-orange-500 text-white text-xs px-2 py-1 rounded-full font-bold shadow-lg">
-          💰 OGLAS
-        </div>
+
         
         {/* Play button overlay */}
         <div className="absolute inset-0 bg-black/20 group-hover:bg-black/40 transition-all duration-300 flex items-center justify-center">