In that video above you can see the scope mount he is using is the UTG Medium Profile for pellet guns. This mount really hangs on to the small groove that Marlin uses on this rifle. Regular scope rings tend to walk off that rail after a while. The UTG prevents that. $15. on Amazon. Definitely worth while.
Bought it, brings the scope too high for my taste. Ended up drilling and tapping now the scope is as low as it can. I did buy the utg dovetail to picatinny and it worked with a dot but had issues with a scope maybe because it's heavier.