Really more of an amusing video vs anything else. Cap and Ball revolver vs. 9×19 NATO M9A1
Of course the 15+1 Beretta will not only hold more shots, but put them on target faster, and reload faster, as well as recover from a malf better. I still think an M1911A1 would be a better comparison. Also given that the 1911 pattern is still in service in the US Marines.
Also while the 9×19 vs. .45 ACP battle is stupid and moot when comparing modern JHP defensive ammo, meaning the 15+1 Beretta wins out over the 8+1 Colt, the Military is restrained to FMJ ball ammo, meaning .45 ACP still shines when it comes to terminal ballistics.
Colt SAA vs 1911 vs S&W 1917 (with 1/2 moon clips only) vs Beretta would also be a fun thing to watch.