HI @marshall_lee, welcome to the forum 
The video stream is already compressed (using H264 compression), and is already sent on its own UDP port (5600 by default), independently of the telemetry and other signals. There are a few different ways of receiving it outlined here.
Feel free to ask follow ups if something isn’t clear, although it would likely be helpful if you specify what you’re actually trying to achieve (the end goal), rather than just the step you’re currently stuck on (which may not be on the best path to achieving the end goal).