encoding video

what does the bitrate do? I changed it from 6000 to 20000 and it made the file bigger .
also GOP? MUX? Buffer? Packet?
I am trying to get the clearest video to put on the television.
we have a video of pix and video made with pinnacle 12.1.
we want a video behind the menu. 6 seconds long.
so far it is quite blurry.
maybe the 1920 by 1080 tvs cannot be sharp!
thanks all

Please just use one of your multiple threads asking about making best quality video output from blender. You don’t need to start multiple threads.