https://www.3dbuzz.com/
I saw that they shutdown via a Games From Scratch video on YT. Not sure about copyright, but all the videos are released as zip files available for download for free. Some things are a bit dated according to GFS.
Theres a lot FOSS devs wouldn't be interested in like the 3Ds max or unity tutorials, but there are also many general tutorials like the first couple. The videos seem to cover either art or programming, there may be some music courses also. No clue.