What I have been calling Rhythm Tracks are more commonly known as backing tracks. there are a ton on YouTube so no need to reinvent the wheel
Belly Ska (Key Unknown)
Reggae Backing Track (F) | 75 bpm – MegaBackingTracks
Reggae Backing Track – Key of G Major
E-A-E-B Reggae here
Now You Shred – epic in that they highlight chords as played and show scales. Epic.