I've started to try Chromium for web browsing and had to find out that there is no Video Download Helper plugin available. A collegue of mine has pointed me to Clipgrab which is not in the Debian repositories. So I sat down and compiled a backport...
New package in "Debian Experimental"
- clipgrab 3.5.6
With ClipGrab, you can easily save your favourite videos from sites like YouTube, Dailymotion or Vimeo. And you can convert these videos into "usable" formats like WMV, MPEG or MP3.
Just copy the link of the website containing the video and Clipgrap will aks you for the details. Works as expected. Great.