I've searched Tips & Tricks, and I can't find the one-minute introduction video that automatically plays when a TV or a device is registered. If you delete it from your home screen, is it gone for good?
Now I understand and remember what you are referring to. I did a quick searching for it and came up empty. I do think that if you enter Guest Mode from the Roku, it may be installed there if you removed it from your regular Home Screen. I think that was the last time I saw it or saw the need for it (guest mode use).
Other than that, probably need to factory reset your device to install back to your home Screen.
Roku Community Streaming Expert Just another Roku user... I am not a Roku employee. Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102