I have lags after recording and playing back videos on my HTC device. Look at this video capture:
I thought it had something to do with autofocus but it is only available in shoot mode. Maybe it is still active in video capturing mode but without ability to let user change settings so they can only be changed in shooting mode? This happened with stock Sandisk 8GB Class 4 SD card and happens with Sandisk 16GB Class 4 SD card that i bought recently.
HTC Desire S
Android 2.3.3 (stock)