MP3s - I've added three MP3s and when I open the site on my desktop computer the first will play fine but the second and third won't play at all. However when I open the site on my tablet the first won't play but the second and third play fine. What's going on?
Youtube videos - I've added the embed code to the page but the video doesn't show up, just the embed code. Do I need to do something else?
I would be grateful for any help with these issues, but in plain simple English please as I'm not an expert. (as you can probably tell!)