Alternative players for video streaming sites

• - polsifier.user.js Greasemonkey script (also Opera User JavaScript-friendly) to automatically convert video links (of the sites listed below - except YouTube) to the equivalent polsy.org.uk player link
• - yt-polsify.user.js As above, except specifically for YouTube
• - Chrome extension equivalent of the above
• blip.tv
• Nico Nico Douga
• ustream.tv recordings
• Veoh
• Viddler
• WeGame
• YouTube