Assuming 25fps is required, the following result was found.
Hubsan H107C and its Q4 Nano, then the DJI Phantom. First up, the Hubsan X4 H107C for $60 USD filming at a reduced 720x480 25fps then further compressed by YouTube Capture app (but includes stabilization): {youtube}jFJJY5uUT0E{/youtube} Secondly, the...