Lots of good info on youtube, lots of junk too!
A lot of good info on youtube, a lot of bad info too. You can find video by a handful of the active posters on here on youtube. I searched out most of them including John Lucas'. All good info!
Someone else who has excellent youtube video, very good quality, close ups, and very good information, is Lyle Jamieson. I watched his tool handling video's a couple times a week for awhile, need to watch them again now to make sure bad habits don't sneak in. He has excellent grinding video too and his own signature grind which I try to mostly copy. A modified Ellsworth as are many of the signature grinds. If turning bowls or hollow forms the swept back wings are much much easier to use than square or near square wings for most areas inside and out. Tightish inside curves need something different sometimes but they should probably be avoided by us beginners anyway.
One thing, there are many ways to skin a cat and many ways to turn wood and get to a finished product. If you use any of the master turner's process start to finish you can get a very good result. However, gonna make that a big bold however, sometimes you can get in trouble taking a little from one master and a little from another!
Find one person whose work you admire and is much like you want to do and try to learn how they do things to have a good basic foundation. You can always branch out and certainly will if you turn wood very long but the solid foundation is important.
Hu