Normally my first step in verifying any vehicle or prop is a through study of Provenance. I have noted that professional sellers of these items normally document provenance fairly thoroughly. As I will not count myself as a Star Trek expert in any way, I can't base much on the certainly quite through information you provided in the video. My next step personally in this case would be to look at its construction compared to how the known examples are made. Find people who have similar, verified pieces, or companies who sell and authenticate these and have experience with similar items. Also the people involved with making the originals. If I were making these in the same quantity that Trek production crew need to, I would be digitally printing them in a one step premade back-lit and 2nd surface mounting it to the plex, not layering in the way this one was done. Lots less labor once you set everything up. Still that just me and in no way is an educated look at what was actually done. Best of luck.