I had the same idea about video proof but it does not really solve the problem with uppers or parts. With the known variations in the lowers or parts available, functional 22LR firearms really comes down to tweaking, ammo, loading the straight mags and technique. Costs increase creating videos and people would just produce videos of their guns failing. I love 22LR but that ammo is just fundamentally unreliable. A mfger just has to be prepared for a % of users who's upper is not plug and play, even if they read the manual and follow the recommendations.
I remember when Sam had customers send in their guns for fitting. That seemed like a great solution for those who needed a fix but some of those people complained about the wait times. I'm not sure what the best solution is.
I have a lot of empathy for mfgers who sell FA 22LR uppers. Casull, Atchisson, Fleming, Norrel, Copper, Tippman, Gratez, Lage, and Schneider know that it's a labor of love and understanding.