What causes a bicycle to squeak? How to fix the noise on my bike

This useful video tutorial will be about the noise your bicycle makes.
I will teach you how to eliminate all extraneous clicks on your bike.
In this video, two main reasons are revealed: the bicycle bottom bracket and inside the bicycle frame, where the saddle is attached.
If you repeat everything after me, your bicycle will no longer squeak!
Enjoy watching, fellow cyclists.

00:00 How to fix the clicks on my bicycle.
00:28 Removing a bicycle cranks.
01:25 Wear bike bottom bracket.
01:47 How to remove a bicycle bottom bracket.
02:11 Sand inside the bicycle frame.
02:53 What causes a bicycle to squeak?
04:52 How to fix the noise on my bicycle.
06:24 How to clean the threads of a bicycle frame bottom bracket.
08:00 How to lubricate the threads for the bottom bracket of a bicycle.
08:27 Unpacking bike bottom bracket.
09:12 How to properly install bike bottom bracket hollowtech.