DamnVid

It came time to download some videos off YouTube to migrate them from one account to another... Dont' ask me why, that doesn't really matter. So, be that as it may - it is not as easy as it may seem. The FlashPlayer used to save them in your /tmp directory on Linux - but no more. The directory recommened at the link:

.mozilla/firefox/userprofile/cache

does not seem to contain anything resembling the video files one would expect either. However, then I followed a link specified at the above to get DamnVid and this seems to be working. The video ends up right under your ~/Videos directory hierarchy.