Awesome

iSponsorBlock

A jailbreak tweak that implements the SponsorBlock API to skip sponsorships in YouTube videos.

More info about SponsorBlock and the API used can be found here.

This tweak has been tested on the latest YouTube version (18.20.3) and supports, at least, down to version 17.30.1.

Add the following repository: https://repo.icrazeios.com

To access this tweaks settings open the YouTube app, and there should be a button in the top right, like in this image: https://imgur.com/lLpfXue.