Oh no, I get it, I was quite scared the first time I messed with it, and I cursed LG plenty for not letting me install safely what I want on my own TV. I found this technique to be quite safe though. You basically uninstall the official YouTube app, then do the loading and you can always remove the app and reinstall the official one.

I hope I didn’t sound condescending, I just realized that I had been a bit too quick labeling something easy, while I understand that for some other person reading, using a CLI tool is in itself a new thing. Good luck :)