Via youtube I've learned to:
Replace the cam-agitator of my washing machine
Change the kitchen sink garbage disposal
Change a laptop HDD
Operate my Dyson vacuum cleaner
Great resource.
car issues, building foundations, pouring concrete, aerating, over seeding, landscaping, etc
my cooking skills are way higher from youtube...tons of prof chef vids, homecooking...BBQ Pit Boys are great
i also use it to research products i am buying