As a final update to close this post, I think I will CRAWL INTO A VERY SMALL HOLE AND DIE QUIETLY without making a fuss...
Yes, of course it would only display the videos in the folder as I was selecting the media button.
When I select the other file types they show up without any problem.
REALLY sorry to have wasted your time with such a ridiculous oversight on my part. Can´t believe I´ve done such a newbie error.
Thanks alot to both of you, Mary and Ken.