Is there more info about this? I could only find Chinese forums like https://m-weibo-cn.translate.goog/status/OdaBMza1L?from=page_1005052963774131_profile&wvr=6&mod=weibotime&jumpfrom=weibocom
The chips (basic TTL logic, perhaps) are all DIP. This may predate the term "open source".
I don't; I have NewPipe and 2 of its forks installed.
Frankly, YouTube should just tolerate the cheaters because they still bring more money than what I think ads would, and when they get screwed over they will likely not buy the service again.