BG have as much right to post videos of their FC adventures as anyone else. Just because they are trailblazers and at the forefront of end game doesn't mean they should have to in any way censor themselves.

Many in the community enjoy watching them play and their strategies.

Frankly, OP, you claim it is easy to find 7 people who are willing to "go alone", by that I guess you mean entering a situation without any research/non-primary resources then it should be easy to find people who are willing to leeroy jenkins the shit out of content. (I kinda like to plan ahead with my limited game time and learn what I can from secondary sources, call me crazy)

Also, why did you single out BG? Just because they're the most well known non-JP LS? There are many others who post their strats.
For the record, I think it was several weeks after their wins that BG ever said anything about how to Coil, let alone twintania.