Replacement of the drivetrain of a bicycle in a workshop. Bike service

In this video tutorial I will show you how to replace the drivetrain of a bicycle in a workshop.
We are going to do a partial service on the bike so that the new parts will work as needed.
To make sure the bike mechanic's work is done efficiently, we have a quality control inspector visit us!
Verbal-free ASMR video showcasing mechanical sounds. Understandable across languages; an international DIY video.
If you're a fan of cycling, this video will be right up your alley.
Have a nice viewing, my dear bicycle viewers!