You can connect to WiFi to download the required square dance video directly on the network, without OTG cable is also possible to download, you can also use the traffic to download.
Square dance is an art form performed in squares, and is a rhythmic dance performed by residents in squares, courtyards and other open spaces for the purpose of fitness, usually accompanied by high decibel, rhythmic music. It is created by non-professional dancers, mass self-organization, the participants are mostly middle-aged and elderly people, among which the majority of the dance, a variety of elements, including folk dance, modern dance, Latin dance and so on.