Is one allowed to take music/shiurim of youtube onto one’s ipod from both jewish and non jewish artists?
It is not permitted, according to copyright regulations, to copy copyrighted material from Youtube onto an ipod.
In addition, I believe that this is an infringement of Youtube regulations.
Therefore, the practice should be avoided, for non-Jewish and the more so for Jewish artists.
This answer assumes that copyright law is binding according to Torah law. There is a broad debate on the subject, and we have mentioned some sources here: https://dinonline.org/2010/09/05/altering-a-song-for-production/.