video embedding not working for me

Try using the embed code from vimeo, if the bare URL won’t work:
<iframe src="http://player.vimeo.com/video/71962661" width="500" height="281" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe> <p><a href="http://vimeo.com/71962661">EDITORS - FORMALDEHYDE (OFFICIAL VIDEO)</a> from <a href="http://vimeo.com/piasgermany">PIASGermany</a> on <a href="https://vimeo.com">Vimeo</a>.</p>
For changing the code to something different, visit the video page. Also see: http://codex.wordpress.org/Embeds

The url must be in plain text. If you hover your mouse over the url, it should not become underlined, like a link. If it does, cut the url text, then paste it using the plain text button in the editor.