What is the purpose of the capacitors on the input and output of this circuit?
if it helps, here is just the circuit from https://imgur.com/a/bbTDSYJ referred to in the question

also the circuit seems to be linear balanced video amplifier. (or a linear RF voltage amp.)


capacitors at input are part of a LP-filter that can prevent self-oscillations if no input is connected (for one)
capacitors at output provide AC-only coupling