My Droid X2 was not able to record video. All I got was video and sound noise and an occasional nice picture.
I pulled my stock memory card from my phone and saw it was a Class 4 micro SDHC 8GB - I have a Class 6 version form my old phone. I prepped my old card and voila video was perfect.
Verizon and Moto should have known better. My next card will be Class 10.