Just a quick test with some of the footage shot with the NX70. "Zorro" rides by on the sidelines at full gallop. Stretched the clip by a factor of four, then rendered with the built-in Sony AVC codec using all the 1920x1080 30p "YouTube" defaults.
I'm glad this hombre knew how to control his steed!
Here's the project setting:
Win7 Pro X64 on Dell T3400, MultiTB SATA, 8GB RAM Vegas 10e x64 DVDA 5.2(build 133) Sony HDR-CX550V