Thanks for the comment, Hmm, I never tried the mobile format(17). But after you mention it, I checked it out and indeed seem broken, then I checked the page on youtube server and most of my uploaded videos don't even have that format listed, seem I need to put some attention on that. Anyway stick with 18, and some videos are restricted to web viewing only where they can show you their ads. The best bet is set it to what it worked which is 18. Again, thanks for bringing it to my attention.