This library/program solves problems that people have with pages like youtube... too many ads, no way to download videos for offline use (or archive for when they get removed), and better performance with a native player.
If I was forced to watch all the ads on youtube, i wouldn't watch videos there at all.
Consuming not only their resources but also their incredible streaming algorithm for free is just a dirty move.
Doing this just puts you into the statistic of bad users that incentives companies like Google to push more intrusive DRM. Which at the end of the day makes us all suffer.
And I consider them bad advertisers and just don't care.
We had the internet without ads. Then we had the internet with small banner ads, that didn't track users but were there because of the page content. Then those ads moved from text/image to animated gif, and they became annoying. Then flash was used and it became a security concern. Then the number of ads went up and up, video was introduced, autoplaying, with audio, and at some point most of the internet is unusable without an adblock. It's not something we, the users, wanted, the advertisers (google included) made the internet unusable without an adblock, and that includes 3 25 second ads on a 1m20s video on youtube.
If advertisers returned to non-animated banners above/below the video, we wouldn't have to install adblocks everywhere anymore, and people would see the ad without wanting to kill the advertiser for bad intrusive advertising practices.
They started it, they went too far, we're just reacting to what they're doing. And as we've seen with other platforms, even paying for premium doesn't mean no-ads. And still an adblock is needed to remove the in-video ads ("this video is sponsored by shadow vpn audible").
If I was forced to watch all the ads on youtube, i wouldn't watch videos there at all.