I may not always be commenting, but I am closely following this case. If you have certain frames you like to talk about, I am more than happy to look at them.
I'll just say this, altering frames - not deleting them - would leave a trace IMO, since the target is moving. Any blurring for example would have to be done consistently in every single layer.
That blur or obscurity would have to be of a progression in itself considering size and opacity. We are talking about hundreds and thousands of layers. Lots of manpower needed.
Granted, the SWFA released the video almost 8 months later, but MPD would have confiscated it on day one or two. Given the experience of the SWFA security cam operator or employee or owner generally watching the surveillance tapes - any tapes-, I am sure, they would have noticed any discrepancies. It's like watching your favorite show and they replaced some of the actors with lookalikes..just saying.
All my opinion only. I am not a forensic photo - video - photoshop etc. specialist. Take it all with a large grain of salt.
RIP Missy Bevers - NOT forgotten!
-Nin