Youtube vids can be played at different speeds using the vid's settings.
Vimeo vids have no such settings control. However speed can be adjusted in Chrome with neat work-around:
1. Right click on the bookmark bar
2. Click on the "New Page" submenu option
3. For the "Name" field enter something like "VimeoSpeed"
4. In the "URL" field copy and paste this bit of script:
A new bookmark should appear in the bookmark bar with the name entered in item 3.
Now go browse a video in Vimeo as usual. To change speed click on the bookmark created above. A dialog box will appear "Set playback rate". Enter a number - for example: 1.5 to play 150% of normal speed, 2 to play twice speed, 0.5 to play 1/2 speed. Or as required. The Vimeo vid will now play at the entered speed.