Video problems

Ive got problems with watching some of video files in your old issues. I checked it on three devices (iPad Mini Retina,
iPad3 & iPhone 5) in different WiFi and 3g nets. But nothing changed - igot the same problems with the same
videos. Can you help me? I dont want to return my money back, i just want to have an access to everything ))

Папа Ваня about Guitar Techniques, v3.8.1