Machining, engineering and more is a massively popular thing on video platforms and websites in general these days. Books are going to be their own thing a bit later.
Very much always going to be incomplete but best to have something to start with
Anyway
Machining
AvE
https://www.youtube.com/user/arduinoversusevil
Usually more on the messing around side of things and tool breakdowns but massively insightful into how things work when you have to go at scale.
Keith Rucker/Vintagemachinery.org
https://www.youtube.com/user/ksruckerowwm
Frequently does repairs and examinations of older machining techniques
Abom79
https://www.youtube.com/c/Abom79/videos
Oxtoolco/Tom Lipton
https://www.youtube.com/user/oxtoolco?feature=watch
Cutting Edge Engineering Australia.
https://www.youtube.com/channel/UC2wdo5vU7bPBNzyC2nnwmNQ
Newer channel but does repairs of all manner of mining, industrial and similar technologies.
ThisOldTony
https://www.youtube.com/c/ThisOldTony/
More of a home shop type but video production and humour is top notch.
Fireball Tool
Tests, large fabrications, repairs... does it all really.
https://www.youtube.com/channel/UCVveEFTOd6khhSXXnRhxJmg/videos
Keith Fenner
Jobbing repair machinist, some of the best workholding techniques I have seen.
https://www.youtube.com/user/KEF791/videos
Clickspring
Generally noted for very in depth projects covering all manner of techniques along the way.
https://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MA/videos
Mr Pete/Tubalcain
Old high school machine shop teacher does videos covering all manner of tools, techniques, approaches.
https://www.youtube.com/user/mrpete222/videos
Alec Steele
A blacksmith but does a fair bit of machining, and
https://www.youtube.com/user/alectheblacksmith/videos?disable_polymer=1
Beyond the Press
Sister channel of hydraulic press channel but covers all manner of machining activities, and destruction.
https://www.youtube.com/channel/UCveB47lgzZJ1WOf4XYVJNBw
Stefan Gotteswinter
Seriously in depth and precision work here
https://www.youtube.com/user/syyl/videos
Uri Tuchman
If you want to learn hand techniques and engraving then start here
https://www.youtube.com/channel/UCHsqqRjziUaMwZgQZHw-n1w/videos
Maximus Ironthumper
A blacksmith but more traditional
https://www.youtube.com/channel/UC5iNSo8ml7fq31t3K6m5Vgw/videos
Joe Pieczynski
Precision taking to an incredible degree.
https://www.youtube.com/channel/UCpp6lgdc_XO_FZYJppaFa5w
Engel's Coach Shop
https://www.youtube.com/user/EngelsCoachShop
Does as it says and mostly repairs wooden coaches, wheels for them and related things. However still some of the finest applied techniques anywhere.
Electronics
Eevblog. Arguably the oldest of the video channels, covers all manner of electronics and related topics
https://www.eevblog.com/
The Post Apocalyptic Inventor. Splits the time between general engineering and electronics
https://www.youtube.com/channel/UCDbWmfrwmzn1ZsGgrYRUxoA
PhotonicInduction
The fun and destruction you can do with high voltage, and also some really nice rare and hard to come by industrial and old items.
http://www.youtube.com/user/Photonvids
Mikeselectricstuff
Teardowns, very high level in depth discussion of things,
http://www.youtube.com/user/mikeselectricstuff
John Ward
Teardowns, concepts, discussion of UK domestic electrics, lots of vintage stuff as well.
https://www.youtube.com/user/jjward/videos
Big Clive
Teardowns of many things but most notable for tearing down cheap Chinese electronics.
https://www.youtube.com/user/bigclivedotcom/videos
Woodworking
Matthias Wandel
Builds all manner of woodworking machines, experiments and more.
http://www.youtube.com/user/Matthiaswandel
3d printing, chemistry, general science, vehicles, sheet metal techniques and much more to follow. This is all just a starter from bookmarks for now.
Very much always going to be incomplete but best to have something to start with
Anyway
Machining
AvE
https://www.youtube.com/user/arduinoversusevil
Usually more on the messing around side of things and tool breakdowns but massively insightful into how things work when you have to go at scale.
Keith Rucker/Vintagemachinery.org
https://www.youtube.com/user/ksruckerowwm
Frequently does repairs and examinations of older machining techniques
Abom79
https://www.youtube.com/c/Abom79/videos
Oxtoolco/Tom Lipton
https://www.youtube.com/user/oxtoolco?feature=watch
Cutting Edge Engineering Australia.
https://www.youtube.com/channel/UC2wdo5vU7bPBNzyC2nnwmNQ
Newer channel but does repairs of all manner of mining, industrial and similar technologies.
ThisOldTony
https://www.youtube.com/c/ThisOldTony/
More of a home shop type but video production and humour is top notch.
Fireball Tool
Tests, large fabrications, repairs... does it all really.
https://www.youtube.com/channel/UCVveEFTOd6khhSXXnRhxJmg/videos
Keith Fenner
Jobbing repair machinist, some of the best workholding techniques I have seen.
https://www.youtube.com/user/KEF791/videos
Clickspring
Generally noted for very in depth projects covering all manner of techniques along the way.
https://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MA/videos
Mr Pete/Tubalcain
Old high school machine shop teacher does videos covering all manner of tools, techniques, approaches.
https://www.youtube.com/user/mrpete222/videos
Alec Steele
A blacksmith but does a fair bit of machining, and
https://www.youtube.com/user/alectheblacksmith/videos?disable_polymer=1
Beyond the Press
Sister channel of hydraulic press channel but covers all manner of machining activities, and destruction.
https://www.youtube.com/channel/UCveB47lgzZJ1WOf4XYVJNBw
Stefan Gotteswinter
Seriously in depth and precision work here
https://www.youtube.com/user/syyl/videos
Uri Tuchman
If you want to learn hand techniques and engraving then start here
https://www.youtube.com/channel/UCHsqqRjziUaMwZgQZHw-n1w/videos
Maximus Ironthumper
A blacksmith but more traditional
https://www.youtube.com/channel/UC5iNSo8ml7fq31t3K6m5Vgw/videos
Joe Pieczynski
Precision taking to an incredible degree.
https://www.youtube.com/channel/UCpp6lgdc_XO_FZYJppaFa5w
Engel's Coach Shop
https://www.youtube.com/user/EngelsCoachShop
Does as it says and mostly repairs wooden coaches, wheels for them and related things. However still some of the finest applied techniques anywhere.
Electronics
Eevblog. Arguably the oldest of the video channels, covers all manner of electronics and related topics
https://www.eevblog.com/
The Post Apocalyptic Inventor. Splits the time between general engineering and electronics
https://www.youtube.com/channel/UCDbWmfrwmzn1ZsGgrYRUxoA
PhotonicInduction
The fun and destruction you can do with high voltage, and also some really nice rare and hard to come by industrial and old items.
http://www.youtube.com/user/Photonvids
Mikeselectricstuff
Teardowns, very high level in depth discussion of things,
http://www.youtube.com/user/mikeselectricstuff
John Ward
Teardowns, concepts, discussion of UK domestic electrics, lots of vintage stuff as well.
https://www.youtube.com/user/jjward/videos
Big Clive
Teardowns of many things but most notable for tearing down cheap Chinese electronics.
https://www.youtube.com/user/bigclivedotcom/videos
Woodworking
Matthias Wandel
Builds all manner of woodworking machines, experiments and more.
http://www.youtube.com/user/Matthiaswandel
3d printing, chemistry, general science, vehicles, sheet metal techniques and much more to follow. This is all just a starter from bookmarks for now.