The leaf on the darker grapes looks like a fabric leaf, I'd kinda bet they're all fake for these demos / testing.

Don't need the robot to smash a grape when we can use a fake grape that won't smash.

The bananas are clearly plastic and make a "doink" nose when dropped into the bowl.

Haha show the whole room and work either on a concrete floor or a transparent table.

This video reeks of the same shenanigans as perpetual motion machine videos.

welp i guess i should get my sight checked