As said, I would do the outside WFP.
Getting on and off the balcony is a different matter, there is a safer way to do it and that guy isn't using it.
1] use a ladder with stabiliseri fitted.
2] Place the ladder so that it just protrudes above the top rail and make sure the top of the ladder goes behind the left hand down pillar
] take a small pair of steps[ I use a milk crate] up and place it on the floor, step over the balcony rail onto the steps or crate. [cock your right leg over and the ladder can only press up against the down pilar].
Getting off, you stand on the steps, cock your left leg over, again the ladder can't move sideways because the pillar is s stopping it.
I use this method all the time and it has proven to be quite safe.
The problem is at my age I am finding it harder to get my leg over.