Facebook just dethroned Yahoo as the second most popular video website after YouTube according to comScore. If you get into the stats, Facebook saw more than 53 million unique viewers throughout July, compared to Yahoo’s less than 49 million. While YouTube remained at the top spot with nearly 157 million total unique viewers. What’s interesting is to note that users of Yahoo, though less in number, watched more videos than those of Facebook. To bring that into perspective, users of Yahoo watched about 625 million videos compared to 327 million of Facebook. There’s a comparison of various video sharing websites from comScore after the break.