How to recover deleted video photos from iPhone?

If you accidentally deleted a photo or video, you can recover it within 30 days in the Recently Deleted album. Please see the link below for instructions.

How to recover deleted photos on your iPhone, iPad, Mac, or Apple Vision Pro - Apple Support

If they were deleted longer than 30 days ago, then I'm afraid they are permantly deleted and cannot be recovered.

Deleted Photos or Videos beyond 30 days are gone, unless you saved them in another location yourself. After deleting they will go into the Recently Deleted album and remain there for 30 days in case you change your mind. If you delete them from that album before the 30 days, then they will be removed immediately.

How to recover deleted photos on your iPhone, iPad, Mac, or Apple Vision Pro - Apple Support

If you are not using iCloud Photos, then photos and videos are saved in a backup file, but that is only useful if you used Archived Backups with a computer where you can choose a specific backup date to restore before you deleted the Video. When using iCloud Backups, any new backup overwrites the previous backup, so there is just the most recent one to use for restoring data which would not contain any photos or video if deleted before that most recent backup was made.

Perhaps you have shared your pictures with friends-- then you could get them to send copies back to you.

Unfortunately, if you don't keep your own backups to an external drive, then there really isn't any place else to look. To back up your pictures you can just plug in an external drive, select the pictures, and use Share>Save to Files. Alternatively, you can backup to a computer:

Transfer photos and videos from your iPhone or iPad to your Mac or PC

If you haven't done one of those backups, then your remaining pictures continue to be in peril.