Edited review : The below seemingly happens due to a change the YT made and the dev sent out an email that he is working on it, but nonetheless, I should be able to choose whether to not use the extension's player or the regular player. Some points remain for now but we shall see after the fix is applied. Updated my stars to 4 for now. Thanks for the proactivity!
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The premise is good, but there are extreme issues with using this extension.

- It often plays the videos twice simultaneously (reg. player and this ext.'s player) so double audio and processing
- It often hides the "this tab is playing audio" speaker icon in the tab
- The "restores old video player" feature does not work. It does change the video player but to something completely different that lacks many functionalities of the regular player and overall looks much much worse, not just subjectively, but by objective measures as well.
- The "report a bug" feature does not work, tried submitting bugs twice, but both times it failed on the extension's end.
- The extension is 100% paid, which is not really clear when installing the extension. The "free" part is a 7day free trial
- The free trial version does not function the same as the paid version - After paying, it started behaving differently.

I am giving it 2 stars because it does block the ads, but so do others and this one has a plethora of issues that ultimately made me spend the time to write this review.

I don't wish to sabotage the work of the developer, it just truly was a bad experience. I am open to modifying it of course, but to do that, I'd need to come back to it in the future and "test" it... I think it is definitely okay to make the extension paid, but not when it has not been properly tested. Perhaps YouTube is to blame here and is messing with the extension, but still. Make a toggle to enable/disable all individual features of the extension so that if YT breaks the "player" part of the extension, I can just toggle it off so that I can return to the regular yt player and still use the extension.

cant send out a message in the extension but it's not currently working on youtube - otherwise when it does the job done is fantastic

Kind of a bummer that they went for a paid model from an open source model. But thankfully, they're still charitable at heart so at least I know it's for a good reason.

Nevertheless, A very good plugin for youtube that gives back control to its user to enjoy youtube like back in the olden days.