MarsSeed [1] filed a deletion request for ytdownloader-appimage [2]:
Duplicate of the following AUR package:
https://aur.archlinux.org/packages/ytdownloader-gui
The latter is up on upstream's website as the official Arch Linux
package.
This is an Electron-based application, so an AppImage is not
conforming to the packaging guidelines.
[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/ytdownloader-appimage/