Integration with SponsorBlock

Google Chrome and other browsers have a good SponsorBlock extension that allows you to view Youtube videos without sponsored inserts and other "garbage".
And there is an API for this extension: https://github.com/ajayyy/SponsorBlock/wiki/API-Docs

It would be very good if your program could download Youtube videos without sponsored inserts using available technologies.

Example of a video with sponsored inserts and more:
https://youtu.be/R8ObMz2qixE

YouTube manifest has no information on the availability of sponsored inserts. The video comes complete with integrated sponsored inserts made by the video owner himself.

The project you mentioned (SponsorBlock) allows its users to mark sponsored inserts themselves and submit them to SponsorBlock database.

Unfortunately, this method is not acceptable for the majority of projects downloading video from videohostings.