This is the link application that can search for videos of Kagamines.
Also not good at Japanese, no problem.You can find the song in English.
And operation is very simple.
#You can look for new videos.
#You will easily find a hit song. (42 songs)
#You can look for funny videos.
#You can introduce to everyone using Twitter.
*version 1.2, up 5 songs.
*This app is unofficial.
*In youtube, you can watch the video.
2015/5/14 version1.2 (up 5 songs)