V-Share funktioniert nicht

This program enables piano students to access hundreds of video / audio resources that help students accelerate and improve their piano learning process.  There are a lot of piano resources like DVDs and CDs, or even you can search many related internet videos, why v-share?  Each selection is played by professional piano teachers with many years of teaching experience, and we are always adding new repertoire.  We found that when students practice piano daily, a handled device like iPad is one of the most ideal tools.  Usually when students sit in front of a piano, accessing TV or laptop is not convenient, but a handheld device can be easily put on the piano.  All songs are played by professional piano teachers with many years’ experience.  Searching for videos on internet is quite time-consuming, and often most parents, with limited musical knowledge, can’t judge whether the videos searched are good enough.  Audio material will be merged with video after professional processing, thus ensuring the quality of video and sound.  All the videos are recorded with high definition; all the audios are produced professionally.  When recording, the video and audio are separated.  Most channels are recorded first, hands together at regular speed and then slowly, hands separately.  V-Share is a program running on iPad and iPhone.  All the videos on V-Share are 1080P.  Anyone can learn many songs even if they don’t read notes.  When students watch the slow speed, hands separate video; they can easily set a mark anywhere, later they can click 'Play from mark' to play a particular music block repeatedly.