Recording Stopped - Please try again - Quicktime OS X 10.10.4

Hello,

I make youtube videos and i screen record with quicktime but also at the same time use movie recording for face cam. This used to work perfectly but now it always stops after 2-3 mins. I have low space but i didn't think it would affect such a short video. One game on steam takes up around 80gb and deleting it will free up my Macbook Pro but do not want to delete it because i play it often.

If you have any ideas of playing the game without taking up 80gb or methods on fixing quicktime error PLEASE HELP!!!

Thanks.