Aren't there programs that you can run an image through to see if it's fake/tampered or genuine image or Video?

there are programs that make such claims.

but no. a good photoshop is 100% undetectable.

companies that claim to be able to detect fakes are rigging their tests in favor of a very narrow bandwidth of parameters where their software excels -- usually relying on "mistakes" made by a drunken (presumably) photoshopper.

a good photoshopper can make 100% undetectable fakes.

100% undetectable .