How can I fix overexposed video

I got ONE-X2 just a 3 weeks and haveing some issues with recording. Today it was my second take. I went to the location and when I turned on the CAM on the monitor everything is over-exposed (to bright). I know in general what could cause that (shutter speed, ISO, etc) but I cannot find any settings for that. They way the MENU is designed and operates on this cam is really poor (not to say it sucks).

My CAM video settings are set to Standard. I have spent half an hour trying to figure out how to fix this bright video but finally gave up.
Another thing is that once the CAM gets hot there are tons of problems. IT got hot and it shoot itself off. After 15-20 min it was cool (normal temp) but when I turned it on the monitor screen was so pale I could not see anything.

I think the rounded menu should be changed to the rectangular (in the fufure) and the fonts should be way much bigger. I'm 60+ and it is close to impossible to read the screen. I've sent a request to the company.

I watched to video about the CAM settings but still cannot grasp how to do certain things. Iwhile being on the site I was hoping to get the exposure settings fixed through the phone, but connecting this CAM to the phone is a real pain and the mobile APP, once open looks like website with commercials. It really sucks.

Any help appreciated.

ART