I just posted a reply with some sample videos from an older model Aiptek ActionHD camcorder. Reply #15.
The thread has some discussions related to the issue of comparing:
1) Smartphone cameras
2) 60p video cameras
3) high-performance, high speed video cameras such as the Casio FH100.
Some well-framed videos of tennis strokes might be useful for those considering using or buying a video camera for tennis stroke analysis.