Never replace your Shield.
Install SmartTube instead.
SmartTubeNext APK 18.69 Download Official (2023)
You'll need to manually install the APK, but after that it self-updates without any effort from you (except saying Yes to the update).
It takes some getting used to because the UI is a lot different than the YouTube one, and you'll also have to get used to what it does, but once you do you'll love it. It completely removes any and all YT ads, of course, but it also has a pretty good ability to skip other shit too. I don't know if it works off of predictive stuff or people manually send in info or what, but it will put a little notification up in the upper right for stuff like in-video sponsors ("Get Raid Shadow Legends with my promo code!!!") or interaction reminders (Like and subscribe!) and you can either clear them out with the back key on your remote or skip that content by pressing the middle button. I'd say it is about 99% accurate with stuff like the in-video sponsors; just click the button and you're instantly to the spot where the real content starts up again.
Occasionally a video with a bunch of random clips and memes and stuff interspersed throughout will get a ton of content mislabeled as off-topic and it can get a little annoying with the little notification in the corner, but I'd say that happens less than once every couple hundred videos, so it isn't really a big deal.
The only issue I've seen so far is if you try to watch some of the free movies on YT. I almost never do that, but once I saw something I liked and thought I'd just put it on for a bit while I did something else, and it just sat there with a black screen and the trying to load spinning circle. So if you absolutely have to watch the free movies there, I guess you'll have to go back to the real YT app. But for everything else, fuck YouTube.