I am copying here part of a post that I made on a similar subject.
With respect to doing video with a cell phone...
Positioning a cell phone to take video while undetected takes a lot of practice. I know, becasue I have practiced with the original Talon app, which is no longer in use from what I hear. They just never got it to work for a broad range of MS needs and are now using a different app. Because what works best will vary by height, distance from subject and many other factors, no one can just tell you what "hold" and "pose" gives you your best angle for any given shot. Also, unless your phone camera app is capable of turning the picture "right side up" automatically, as, I think, only apps customized for MS work can currently do. phone video may well not be acceptable at all. The shopper will need to ask the MSC what video quality standards the client demands for any given shop assignment. Just about the only equipment that produces video that 20-30 MSCs that assign video will accept is the PV-500 with upgraded camera.
Finally, head-mounted cams, (hat, eye glasses, or hat) typically do not have the battery life to do apartment, new home, etc video shops, which pay well. In addition, on longer shops the constant head movement tends to afeect the video so much that viewers get vertigo! These have their uses for short shops twhere the video must capture activity behind a high counter, by leaning down, or when seated in a vehicle (Drive thru windows, in particular.) But for all-around use, it is still the PV-500 for video quality, versatility and longevity.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.