This is one of the best viral video websites I have ever seen. Viral Viral Videos.com says they go through all videos manually to filter out the ones that have too many ads and lower quality video. So basically its the best of the best.
The website was listed as one of the 100 best in 2013 by the Daily Tekk.com.
Here's a link to THE DAILY TEKK's article.
And here's a link ti VIRAL VIRAL VIDEOS.