I agree in regards to over cueing an athlete. I’ve heard someone say “Think twice, speak once.” I pull out the video about once per training session (up to 12 athletes at once in a session), and it helps when athlete think they’re doing what they’ve been cued at, i.e., brush the bar against the body, when really the bar is half a foot away. They look at it and go, “OOOooohhh, I thought the bar was closer than that.” I think for the most part it takes up too much time which is why I don’t use it often. Here’s an article on coaching cues: http://samleahey.com/science-of-coaching-cues/
There’s a section in Key Concepts Elite where coaching cues are written about.
And again, the video I posted was to show the tools I use, not how I use them 