When ATC asks you a question, especially during an irregular operation or situation, you give them an answer.
If you listen carefully enough to the transmissions, you will hear the pilot say, upon speaking to the approach/departure controller that the reason for the missed approach was an "unsafe landing gear light". I doubt that the pilot was "stalling" as you so eloquently put it. During a missed approach, there are many things going on in the flight deck - reconfiguring the aircraft, flying a missed approach procedure, tuning communications and navigation radios, talking to ATC, etc....[a missed approach is not a simple maneuver sometimes].
Considering that this missed approach was due to an assumed landing gear malfunction, you must consider the internal goings-on in the Flight Deck. There are abnormal procedures and checklists to complete, troubleshooting, coordinating with the Cabin Crew, making a PA to the passengers, the retrieval of manuals and above all else, flying the airplane and talking to ATC! The three fundamental rules of pilots are: aviate, navigate, communicate. The pilot is not stalling, he's just busy.
Did you watch the video? That was a perfectly configured, stable approach to a landing. There's no reason to assume anything else.
You're not a pilot, are you?
You must understand, indications of abnormal situations can happen at any time, during any phase of flight. Having abnormal situations happen during landing and take-off only exacerbates the problem as the workload of the pilots is heavily multiplied when compared to other phases of flight.
Glad to see you enjoy that website; it's also one of my favorites. However, it is rather old....