Looked fake to me. At that size it would pick them up and the dust swirling around it would put holes in them. The tent flying looked really fake like it was on a wire at one corner.
The dust devil I saw was 4 lanes of street wide. It didn't do much but gather up a ton of dust and blow it around like a tornado.
Remember - they're nowhere nearly as powerful as a tornado. Hell - odds are, even if you walked into it, you'd only get pounded by small bits of rock and dust. Yeah, it would hurt, but it doesn't have the power to pick up your average human.
The reason that tent thing flew was because it was light and had a lot of surface for the wind to pick up (like a parachute).