As I stated, the hundreds of those who have reported no problems with refurbs stands as evidence.
Most users don't routinely post videos showing a teardown where no problem was found. I have opened refurb units that I've bought, but had no need to post a video, since there was nothing to show. If you're desperate to see teardown videos that show no problems, you can find plenty on
https://www.ifixit.com/.
You asked how many refurbs have been torn down and then claim that the video you posted shows evidence of a problem, which in the context of the discussion implies a problem with other refurbs. The only evidence it provides is of a problem with that one unit. It is not evidence of any problems with any other refurb devices.