HowCast is a service set up by a bunch of ex-Google employees.
It provides an enormous number of instructional videos, covering everything from how to catch a mouse with a toilet paper roll to minimising pregnancy stretch marks!
The few I watched had extremely high production values. Hopefully, they're indicative of the quality we can expect in general.
The site is currently in beta. I have no idea whether it will be a free service or something you have to cough up your hard earned cash to use. Only time will tell.
Thanks to AppScout for the link.