I have done many hundreds of video shops since 2005. The only ones rejected were because somehow the (earlier models) camera tilted so that there was about 30 minutes of video of my nostrils.
If you are experienced and have gotten good marks with similar non-video shops, you should not fear having a video version rejected.
Since the shopper is audio recorded, of course, it is best to become very confident with the non-video versions of longer shops, such as apartments, automobile sales, senior and assisted living, and new homes, to name a few, before starting to do video. That was, once you have practiced using the body-worm camera at home, you will be less nervous when doing your first video shops. Finally, before spending $400 on a video rig that meets industry standards, try to do some for an MSC that will loan you a rig to use. You will either love it or hate it; but try three before you decide!
You can get low cost or even free video training. It is offered often by IMSC, on line At every IMSC conferee there is a full day of hands-on training. (where there is a fee, but well worth it!!)
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.