If you want a looping animation, they host a WEED!!! Animated Wallpaper that can be downloaded as a GIF.
For a professional, high-definition look, you can find a Flickering Green Neon Cannabis looping motion background suitable for desktop live wallpaper software. 2560x1440 Animated Weed Wallpaper 2560x1440px. ...
This site hosts a dedicated collection of Moving Weed Wallpapers , including the specific 2560x1440px animated file you are looking for. They also offer high-resolution 4K Weed Backgrounds for larger displays. If you want a looping animation, they host a WEED