Link at bottom : The internet is full of great things for free if you know where to go.
The best teacher is experience and not through someone's distorted point of view, There was nowhere to go but everywhere, so just keep on rolling under the stars. So shut up, live, move, adventure, bless, and don’t be sorry. - Kerouac
Example: There is this awesome Google Photos album with stock PREMIUM wallpapers from every single device developer updated.
What it looks like Video: How To Guide AREA39-X
When a new device is released its wallpapers are uploaded there almost instantly.
Sometimes wallpapers appear there before the phone is announced: a few days before Unpacked 2020 all of Galaxy S20 wallpapers were already there, including video wallpapers.
Just add yourself to the folder on your phone
AREA39-X Wallpaper link