I am shooting AVCHD 1440x1080 with a max bit rate of 13K on the camera, and producing pieces intended for posting on YouTube @ 1280x720. The raw files are *.MTS. I have rendered several pieces using MainConcept AVC/AAC (MP4) at 1280x720 and thought (at first) they looked great on YT using these settings:

MP4 RENDER SETTINGS:
Size: 1280x720
Profile: Main
Frame Rate: 29.97 (original footage shot at this FR in a 60i wrapper)
Field Order: None
Pixel Aspect: 1.000
VBR: 10 mbps to 13 mbps (2-pass)

I just posted a video shot of the US Air Force Thunderbirds, and the high speed movement of the planes is revealing a shaky appearance in the frames of the final render - almost like multiple frames are rendering together. It's a 10-minute piece, but if you jump to 9:34 (shot of the 6 planes flying near the camera) you can really see this effect/problem when the planes are nearer to me before flying away:

I've run some test renders using MPEG-2, and have been able to get rid of the shaky renders ~ but some of the MPEG-2 HD formats render a separate audio file which won't work when uploading to YT. I'm still a noob when it comes to field order, render formats and what works best ...etc.

I can offer more information, but am not sure what is needed to help me ~ so please ask! Here's my question:

Q: What format should I be using to render video originally shot as AVCHD @ 13mbps ultimately intended for YouTube?

Thanks!
--Kevin