feat(YouTube): Show video length based on current playback speed

[FawazBinSaleem]

Feature description

This feature would update the total length of the video, kind of like how sponsorblock does based on the current Playback speed. For ex: a video is 14 minutes on 1x but 9 minutes on 1.5x and it's shown accurately based on how Sponsorblock does it for ex: 20:00 (10:00) where 20 minutes is the original length of the video and 10 minutes is the updated length after applying a Playback speed.

Motivation

This feature currently exists as extensions for both chrome and Firefox, refer to : https://github.com/kurtnettle/yt-pb-calc It would be a nice feature to have for revanced youtube aswell.

Acknowledgements

• [X] I have checked all open and closed feature requests and this is not a duplicate
• [X] I have chosen an appropriate title.
• [X] All requested information has been provided properly.