I faced the same issue with my phone overheating during video calls. One thing that helped me was making sure my phone's software was up to date. I also found that closing background apps and lowering the screen brightness helped reduce heat buildup. Additionally, using a phone cooler or placing my device in a cooler area while on a call made a noticeable difference. Give these steps a try and see if they help alleviate the overheating issue!
3.5