As with almost everything related to switches, the answers you seek can't really be found on a forum, but through a blind test you perform yourself. Just stick 3 filmed and 3 unfilmed switches on a switch tester. Jumble them up, put keycaps on them, and test them out. Test for different types of wobble (north/south, east/west , while key is depressed, while key is up etc).... Or don't, and only test for the metrics you care about. For example I can't stand wobble when lightly resting fingers on keys, but am much more forgiving of wobble when the key is depressed - the two are entirely different, and many switches excel at one but fail at the other. Score each switch out of 10 on each metric, and average the results.
Whether filming helps or is pointless, either way the scores will give you your answer. And it'll be the only meaningful answer, because it will directly relate to your switches, what you personally can and can't feel, and what you personally do and don't care about. Anything anyone else can tell you will be subjective, or based on assumption or hearsay, or based on different switches, lubed differently, that have been opened more often or less often than yours, or filmed with different films, or will be the opinion of someone who is paying attention to different attributes to you.
For me, I've found that filming isn't worth the time in most cases, but I do it for certain switches or keycaps (eg. Artisans) where stem wobble is more pronounced, and I've found it to help a little. I've found that it can improve sound too, but I don't care much about sound.
