The M224 60mm mortar is the smallest crew served indirect fire weapon in the US arsenal. US Army light Infantry companies have a two mortar section, while each Marine Rifle company has a three mortar section.
[youtube https://www.youtube.com/watch?v=DfkOeHQXAaM]When I was stationed in Hawaii, my company’s mortar section was critically short of people once and I was tapped to assist them for a few days during a field exercise. It was awful. That tube and the baseplate (and the associated equipment) is heavy!
Note that there are actually two baseplates. The mortar can be fired in a hand held, trigger fired mode with a small baseplate, and no bipod. The gunner aims by, essentially, Kentucky windage. The 60mm can also be fired from a more conventional baseplate and bipod configuration, in association with elevation and azimuth calculated by a fire direction center.
While a platoon patrol may often carry one mortar with them (usually without the big baseplate and bipod) in a defense, or in a deliberate attack, the full mount would be used, and normally both (or all three) tubes would fire on the same target, to achieve concentration of effects.
Also, this was almost certainly filmed at Twenty-Nine Palms, up the road a bit from me. Though legend has it, twenty-nine is something of a gross exaggeration of the number of palms around…