There is a similar situation with many of the best trails near where I live. I don't mind being called a NIMBY because if I don't act in my self-interest nobody else is going to!
People posting videos of riding on footpaths is upto them but if they want to carry on riding mint trails in mint conditions they might be better served keeping stum.
Near where I live as people have posted about riding on certain footpaths the word has got out about the quality of the riding and the number of riders has increased exponentially. Whereas once it was just a few locals riding the trails now there are people travelling from much further afield. Often driving from nearby urban areas, parking inappropriatly and leaving a lot of litter around which causes further tensions.
In the end the landowners have felt the need to act by putting up new fences with gates across the trail. Whereas once the descent flowed uninterupted from top to bottom now there are a number of obstacles resulting in stopping to open gates etc. It's still an enjoyable trail to ride but not as good as in its heyday.
Some of the other trails which are less well known have remained less frequented and I can still ride them today pretty much as I did 15 years ago.