Everyone needs a "beater" cam - one that they won't cry too loud over if it flies away. http://www.ebay.com/itm/GoPro-HERO3-White-Edition-Camera-Manufacturer-Refurbished-/131452214494?rmvSB=true
Parrot isn't really designed for additional payload - if you are going to add a cam to that better to use an 808 #16 or Mobius - they are less than 40 grams.
Cheers, yeah these all in ones aren't really packing the best tech I know that much. What is that 808?
Original 808 #16 is a great cam! http://www.ebay.com/itm/Mini-DVR-808-Car-Key-Chain-Micro-Camera-16-Real-HD-720P-H-264-Pocket-Camcorder-/180776698380 Only buy the original - not a copy! That seller - eletoponline365 is the agent for the manufacturer, so they are real.