Sara
I do a lot of design work on my MacBook, and I had similar issues. One thing that made a big difference for me was switching to an external drive for saving and working with my video files. It reduces the strain on your internal SSD, which can generate heat when it’s constantly in use. Also, you might want to keep an eye on your Activity Monitor to see if there are any background processes using up too much CPU—sometimes there’s stuff running that you don’t even realize.