That's Ian McCollum, "Forgotten Weapons" channel on youtube. They've taken a bunch of videos on similar themes and compiled them into 2 hour long "movies". I watched Heavy Machineguns and German Infantry Weapons last week. If you've seen his videos they aren't just "hey, watch me shoot steel plates for 20 minutes", he goes over the details of how the weapons work, field strips most of them and adds a good bit of history on each one. Interesting if you're interested in that. You can watch all of the individual ones on youtube but this is nice since it gathers similar types into one place where you can watch straight through or a bit at a time.
Gunnery, gunnery, gunnery. Hit the target, all else is twaddle!
