I like machining, but Just watching a cnc mill run isn't very enlightening unless you know why
Plus, I don't have a cnc machine so it's not very transferable
Except for this, I like this
https://www.youtube.com/watch?v=ytFQMEeq3Bk
I like these videos as they show setups, repairs one offs, and ways to think about machining and work holding.
video channel names
Keith Fenner
https://www.youtube.com/user/KEF791
He's doing a giveaway of a kennedy box full of tools to a suitable young machinist in training - AGAIN this year, his second.
"What's in Your Box?"
You can get in on the fun and donate something too; see the list on his website.
Mrpete222
Lyle Peterson
https://www.youtube.com/user/mrpete222
Highschool shop teacher
Limited experitice with the variety of work, but very good basic lessons.
abom79
Adam booth
https://www.youtube.com/user/Abom79
One man job shop moonlightining from his FT machine shop job.
oxtoolco
Tom Lipton
https://www.youtube.com/user/oxtoolco
plus his blog
He's got more "highbrow" high precision technical skills because of the university and high tech shops he's been in.
Tinwhacker as well as machinist
http://oxtool.blogspot.ca/
Platinium cup for reaction vessel in his blog
Buy his book
Matthias Wandel
An engineer who was part of the RIM/Blackberry startup but was raised with woodworking
https://www.youtube.com/channel/UCckETVOT59aYw80B36aP9vw
Jody Collier
Welding tips and tricks
https://www.youtube.com/user/weldingtipsandtricks
Doubleboost
John Mills
https://www.youtube.com/user/doubleboost
He's made pulsejet go carts, likes steam, does lots of machining and welding with equipment similar to mine so I can relate
Northern England, take some listening to understand him
James Killroy
https://www.youtube.com/user/jtkilroy
Bruce Whitham
https://www.youtube.com/channel/UC6HG4kXPSgb1Bhx6CY9e6iw/feed
Australian machinist, so it's mostly metric, newish channel does very short videos but I think will get better.
https://www.youtube.com/channel/UCbhtq52XjiROLMsJcjPRZVg
Mattias Kristiansson
Swedish doctor with some nice machines makes photography stuff
https://www.youtube.com/user/DrMerkwurdig/videos
Plus look in the video sticky, lots of others.