I just finished a second tutorial on indoor dual line flying. This is my feeble attempt to help people get started with dual line indoors. There are some excellent vids on Rev indoors but as far as I know there is not much available for dual line. When I started I used a manual written in Dutch to learn. It was a little difficult as I don't speak Dutch.
The video covers basic flying and control. I hope to do some more with lessons on some of the indoor tricks. Hopefully can attach that this winter.
For now check out