Although this is very similar it isnt it.
The one I used even had some of these wallpapers but a really easy UI and you could add your own wallpapers all through gui without terminal.
Starting to think i dreamed it but my wife insists I didnt shut up about it when I had it the first time.
I’ve got an LG C1 and have been using homebrew with Dev mode for a while now.
Can confirm it is very easy to do if you have a basic tech knowledge base.
The only inconvenience is sometimes after updates it will delete the homebrew apps but its a 5 minute job to get them back and ive only had it happen probably 3 times over a year.
“Youtube no ads” - the homebrew app, works flawlessly as if it were the original app with all of your subs etc but every now and then a tiny banner comes up begging me to subscribe to premium which I actually love because I can keep telling them to fuck off. The frequency of the little banner is probably once every few times you open the app and its non-intrusive.
Overall the LG dev mode trick with the Youtube No Ads app has been the cleanest and most enjoyable out of the box experience compared to alternative frontends etc.