How can I record an app in background

Due to my poor organization I have 2 simultaneous lectures this semester, at this moment I'm following one on Phone and I record the other one with the Mac (Quicktime and Soundflower) Is it possible to record Chrome or Safari in the background while doing other things on the screen? And for my specifical purpose, is it possible to direct the audio of an app on the headphones and the audio of another app to a different output (external speaker or Soundflower to record)?