Dear Selwyn,
Thanks for posting!
There is no sound in the move-video-clips - due to space limitations, the video clips are "just" showing the move for one time. That is usually about 10 seconds or so - not enough time for sound.
We are right now working on advanced video controls, so that you have slow motion and continuous playback features.
If you look at a move in landscape training mode, the way to go back to the menu is rotating it to portrait mode and then push the BACK button at the top left corner.
We are also adding a BACK button in landscape mode in the next update.
The purpose of the app is to have everything stored on your iPhone, so it doesn't need an internet connection! All videos and photos are downloaded in the SHOP - when you download the package - it is all stored within the app/iPhone.
Any further questions or suggestions, let me know!!
Good winds!
Rossi