Recommendations for Videos Teaching Bicycle Maintenance

[Gritstone]

I'm keen to learn more bicycle maintenance, at the moment it's derailleur set-up but I'd like to generally learn more of everything.

There is a dizzying array of bicycle maintenance instruction videos on YouTube.

So, any recommendations of a series of videos on learning different bicycle maintenance would be greatly appreciated, especially if they're more about teaching proper maintenance rather than trying to flog a maintenance product.