Can "a drone" damage the wing of "an aeroplane" to the extent it actually threatens its ability to fly?
Mr Mann doesn't have a clue what he's talking about.

Wings aren't made from 2024-O aluminum, which is fully annealed and very soft.  The usual heat treat state is T3 through T6.

A Mooney would NOT have .040" wing skins.  The skins will be .016, .020, .025 and maybe .032 in high stress areas around the wing roots. Leading edges would be .025 or maybe .032 inboard, and likely .020 or .016 near the tips and on the control surfaces.  Skin sizes are for structural efficiency and rigidity for minimum weight, not "marketing"... geez.

His approach speed comments are more or less correct, but a Canada Goose will do significant damage to any aircraft it hits in flight and has a good chance of bringing down a Mooney at any contact point.  A Mooney running into a goose at the wing will, at minimum, completely crunch the leading edge in back to the main spar.  A goose will do significant damage to the slat or leading edge of any airliner.  There was a CRJ900 that hit a goose size bird just below the windshield on the takeoff roll near V1, and it came back into the pilot's instrument panel, distributing guts and feathers all over the place.

Geese are bad news and are a vexing problem in the spring in central North America.  The terrain is all browns and if you are descending with a flock below and in front they are nearly invisible until you are passing through their level.

A goose hitting the windshield in front of the pilot or horizontal tail of a Mooney or similar light aircraft will probably bring it down.  On the wing, maybe.

A 2lb drone will do obvious damage as the test showed but would not bring down a Mooney unless it hit the windshield, incapacitating the pilot.  It would certainly go though a windshield.  1/8" plexiglass has roughly the same tensile strength as .020" 2024T3.   You wouldn't want to hit anything heavier than a few ounces with 1/8" of acrylic in front of your face as the only barrier.

So from that standpoint, drones of any size can be considered a hazard to aircraft.