We'll ot sure is it your flash what is causing the "nonsmoothnes" of the video but it looked really smooth to me. If that isn't smooth nothing is.

Bounce looked like it's running with higher framerates than n900. Probably becuase of lower resolution? Don't know. At least the gpu should be more capable (BCM2727 32M triangles/s vs. PowerVR SGX535 = 28 million triangles/sec). These are just numbers of course.