I recently started putting up some work on vimeo only to find out it no longer plays low res videos correctly.
It stretches them to fit in the huge player on their new redesigned layout, making your work, if it is not HD, look incredibly ugly.
Solution, move them over to you-tube, where at least the viewer can choose to watch the video at the proper quality in the player.
Pity because I really preferred the look of the Vimeo site.
a link to my YouTube feed
http://www.youtube.com/user/TheRealRichard64?feature=mhee
a link to the same video on vimeo
https://vimeo.com/user2590247