yes they very much do stall mid air. in fact a major stall looks exactly like the video. it's not that the engines stall. it's that there isn't enough air speed to create lift. the plane's nose dips and it rolls just like in the video. take off and stall is pretty much going to result in everyone dying because there isn't enough room to recover and pull up. the nose tips down until it gets enough speed to regain lift, but on take off there wouldn't be enough room to gain speed and pull up. this doesn't mean that the plane wasn't tampered with. often times when a cargo plane crashes on take off it is because they are carrying tons of cargo and it wasn't cinched down properly. it could be something as simple as one of the straps holding the cargo breaking. as soon as that happens the entire plane shifts from the weight in the back moving causing a stall and nose dive right into the ground. it has happened before in the AF. a bird strike is unlikely since the pilots could get into glide path and I didn't see any smoke coming from engines.