I hope it is staged for the guard's sake, being physically assaulted by an entity is a devastating experience and gets worse if no one believes you.
And I totally agree with you Oz.
I have witnessed a small number of spiritual attacks over the years investigating the paranormal and, unfortunately, looking at the evidence presented, this just does not appear to be one to me.
I totally understand that everyone reacts differently to an attack, but the majority of the ones I have witnessed have one thing in common - the person(s) involved is usually left physically (and mentally) drained immediately after. They suffer a lot of confusion. Putting aside the physical movements in the video of the guard, from my perspective, he is just not acting like a person who has been attacked spiritually.
You also have to take the history of the site into account as well. Interestingly, there is not one single paranormal event, that has been documented prior to this, within the governmental building. In fact, it is the one site, out of
all the buildings around the CAM, that does not get covered in any of the
Tour de Fantasmas ('Ghost Tours') held regularly, although to be fair, this may be purely because it is, after all, the City Hall.
IF this was an attack, you would expect to hear about other activity
somewhere in the building, prior to this event, building up over time to this moment. It is quite rare, in my experience, for an attack of this nature to appear 'out of the blue' and with no other 'strange' activity noted prior. Not even a ghost story...........
Of course, this is just my opinion. Without an investigation, you can only go on presented evidence and in this case, looking at the video and the paranormal history (or the lack of it) of City Hall, I just find it difficult to believe this event was paranormal.