Getting a error when sending a video

[SanujaNS]

Hello @AbirHasan2005
After deploying the bot, it responded as it should be.
Then after sending image to use as a watermark, I send a video to the bot then it responded,
Unable to Download The Video!.
In terminal,
remove: path should be string, bytes or os.PathLike, not NoneType
Download Failed: Telegram says: [400 PEER_ID_INVALID] - The peer id being used is invalid or not known yet. Make sure you meet the peer before interacting with it
with this error message.
I'm looking for a solution.