What's your comments on browsing videos like this? (clipabout.com)

I believe thumbnails are outdated for video consuming. A better way is to let people easily see what's inside a video.

so you've basically crowdsourced the job of an interstitial video editor. It's neat as far as it goes, but I don't see myself coming to a site like this for video discovery purposes so I'm uncertain how you will build traction; however, if you can get a sticky user community to take root then it seems sufficiently fun for that community to grow organically. The underlying technology is not difficult for existing vendors to copy so I think your best bet is to focus on the social-hobby aspect. To that end, I'd be inclined to give front-page content a pretty short half-life: when I see multiple months-old memes on the front page, my reaction as a casual consumer is that it's a me-too site. Make old favorites easily findable, but your front page needs to be baked fresh every morning.