Ditto on the system tuning / responsiveness. Change the blade pitch, length, flexibility and the system and your video could suffer. There $6 a set here in the states; are you really going to save a buck and try your luck. Remember, Chinese quality can very greatly and with a self tightening prop made of plastic with plastic threads.... I'll spend the $1.50 per prop for OEM.
To answer the carbon question (even DJI ones). I've seen many a video and report that you get less flight time. In FPV racing they can give you more punch because the are stiffer, but we are flying camera rigs, not flying racers.
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