Why bicycle is hard to control. Bike headset maintenance

This video tutorial is about bike. I will show you why a bike is hard to control. We will look at why the handlebars of a bicycle can jam. I will do a complete maintenance bike headset.
Video will be interesting for cyclists!
00:00 How to overhaul bicycle headset
00:29 Why bike is hard to control
01:29 Removing the rear wheel
01:48 How to remove rear disc brake
02:32 How to remove a headset
04:47 How to remove a bike fork
05:08 Dirty bike headset bearings
06:16 Bike headset maintenance
06:39 Bike headset maintenance, cleaning all the details
08:28 Cleaning a bike fork
09:18 Beginning to assemble a bicycle headset
09:53 How to grease a bike headset
14:18 Bike headset adjustment