More added. Complete list:
ABC News, Amazon Product, Audioboo, Audiomack, Bandcamp, BBC News, Blip, Break, CBS News Video, CNBC, CNN, CNNMoney, Colbert Nation, CollegeHumor, Comedy Central, Coub, Dailymotion, The Daily Show with Jon Stewart, eBay, 8tracks, ESPN, Facebook, Fox News, Funny or Die, Gamespot, GameTrailers, Getty Images, Gfycat, GitHub Gist (via custom iframe), GoFundMe, Google+, Google Sheets, Grooveshark, Hulu, IGN, IMDb, imgur albums, Indiegogo, Instagram, Internet Archive, İzlesene, Kickstarter, LiveLeak, Metacafe, Mixcloud, MSNBC, National Geographic Channel, National Geographic Video, The New York Times Video, Pastebin, Podbean, Prezi, Rdio, Rutube, Scribd, SlideShare, SoundCloud, Sportsnet, Spotify, Straw Poll, Team Coco, TED Talks, The Atlantic Video, The Onion, TinyPic videos, TMZ, Trailer Addict, Twitch, Twitter (via custom iframe), Ustream, VEVO, Viagame, Vimeo, Vine, VK, Vocaroo, Vube, WorldStarHipHop, The Wall Street Journal Online, Yahoo! Screen, Youku, YouTube