The short video doesn't really show the whole area, so it's hard to say how accessible or inaccessible it is. Our next trip is in October, so I will know more then.
It does appear to be aimed at younger children. My youngest DD is to big to lift out of her wheelchair now ( young adult) and is older than the 'target audience' seems to be. When she was little and much more 'portable', we lifted her out of her wheelchair and carried her around play places like that.
Here are some things I would try with her there if she was smaller. She is a spastic quad with CP, can't walk or stand by herself and does not have good sitting balance out of her wheelchair because her lower trunk tries to stay straight at the hips. She has never been able to do anything independently in playgrounds, but we always tried to get some play value out of anywhere we went.
The climbing net wall is not accessible, pretty much, by virtue of what it is, but I would see if I could hold her or park her wheelchair to one side of it, out of traffic. She would at least be able to grab the nets and 'walk' her hands up it.
The trampoline bouncers, she would love. I would do a 2 person carry and just bounce on that a little or hold her in a standing position (she can't stand by herself) in one place and bounce in that place. We have been on similar places like that where her wheelchair fit onto the bouncy part, so we parked her there and bounced the wheelchair.
The house - I can't see if there is any ramp to get to the top floor, but we would go where we could and look out ( looks too small to carry her up the stairs nd she could not come down on the pole).
Those 'acrobat discs' (the kind of colored discs on ropes) we probably would lift her on and keep our body supporting hers while we swung it.
Slides- can't really say from the pictures whether she could get on, but when she was little, she did go on similar slides with enclosed slides ( could not put her on regular slides because of the danger of falling off the slide). We carried her up the stairs.
Except for the fire truck, I could not really see what was in the circle area, but there appeared to be at least 2 openings wide enough for a wheelchair. We did lift her out of her wheelchair and put her into similar toys to the truck.
She learned pretty early on that we would try to get her involved as much as possible, but there were things that were just not accessible. One of her favorite things to do was boss her older sister around, so for the inaccessible things, we let her do that - kind of like Simon Says. Not easy because she can't talk, but she has good 'body language' and my older DD enjoyed it too. Kind of like mixing sharades with Simon Says.