How can I recover accidentally deleted videos on my iPad?

They are available in the Recently deleted folder in the Photos app for 30 days for you to recover them. If you delete them from the Recently Deleted folder before that time, then they are gone for good.

If you're missing photos or videos in the Photos app - Apple Support

Deleted from where?

If you deleted them from the Photos app, check the "Recently Deleted" folder under Utilities and see if they are still there. (iPadOS 18).

If you are using iOS 12 on your iPad as shown in your device line, then look for the "Recently Deleted" album.

click here ➜ If you're missing photos or videos in the Photos app - Apple Support