Morning all.
I'm of a slightly different view to Incandescent. The test is at the point of entry, and there was space for your father's car then assuming he was looking to bend slightly to the right and reach the space at a bit of an angle rather than head across to pull up directly behind the red car. Indeed it's the space the black car decided to zoom forward and pinch from under his nose as that driver suddenly realised he'd exercised poor judgement and was about to get trapped in the box himself!
At about 3 to 4 seconds into the video, you can see your father's car begin to turn slightly to the right as if about to coast into that space, only to have to abort when the black car comes from behind and into your father's peripheral vision. In my view, it's the other driver which entered the box when the exit was not clear, rather than your father.
Another way of potentially arguing it, if your father was aiming for that space, is that he stopped not due to stationary vehicles but due to that moving black car cutting him up.
If you pause the video at about 7 seconds in, and pretend that the black car did not cross the box, I think it's hard to say that there wasn't space for your father's car, or indeed that he would not likely have simply manoeuvred his car a little more to the right to avoid the rear of his car sticking out into the box junction.
