+1 for DTA

If DTA can't find the link to the content for some reason (it happened to me on youtube a while ago), you can use an addon like LiveHTTPHeaders to sniff HTTP requests and figure out the link for the video.

edit: I forgot to mention that DTA will lag the entire browser like hell and kill your battery, so only use it when plugged in. This happens on Windows + Linux, and idk about OSX.

You can also use developer tools and view the requests coming in, look at the obvious file type (usually flv/mp4) and grab the URL from there.

I just saw your edit. In case you ever stumble back across this checkout the beta versions of DTA. The beta versions have been greatly improved. DTA nevers locks up the browser for me. Its an incredible improvement.

Just tried it, and the performance is awesome! I do miss seeing the obnoxious "donate" banner on the top right though. Thanks for the tip.

Nice tip. I never knew DTA would work on youtube. I have always used youtube-dl.

DTA fails on download for many of the courses actually. Something about "login" keep popping up.

I have never had a problem with DTA and I often use it with Firefox Aurora and NoScript+RequestPolicy+AdblockPlus (AKA extension developer's worst nightmare). What classes did DTA give you problems with? Where you signed up for the class?