I'll second the Scott Rea recommendation.
I killed my first muley last fall and brought it out on the bone mostly. When I got back home I wanted to know what cuts were what when I butchered and searched for quite a while to find a good resource. For free, Scott's are the best. You have to do some research to figure out what 'silver side' and other cuts are - British vs. American terminology- but beyond that, his videos are comprehensive and mildly entertaining ("rock and roll, baby;" he's fairly stuck in the 70's). His whole premise for his channel is keeping the butchery trade alive before it's lost to mass-produced meat factories, and this goes well with our DIY efforts to have control over where our meat comes from.
And he does it all in a tiny kitchen with a couple of knives and a bone saw.
His cooking videos are also good.
There's a Bon Apetit video on butchering a side of beef that's also quite good. Different scale, but same idea. Amazing how one small man can take apart a side that efficiently.
Othewise, Buck, Buck Moose does a reasonable job (and you should own that one anyways).