If you can sideload Android apps SmartTubeNext is a great option https://github.com/yuliskov/SmartTubeNext
There’s this tool for webos. https://github.com/webosbrew/dev-manager-desktop fairly easy to setup and it includes a patched youtube on their default apps. No root or scary stuff required for simple apps like these. I’ve used it and YouTube works pretty much like you expect it to.