Manderin video Translation

Can you translate the instructions from these videos into English? [login to view URL] [login to view URL] [login to view URL] OR if you understand how the unit should work from the instructions. Explain it to me. The link provided is of the whole video, but I can edit the video into parts and then you can translate the corresponding parts in a text file. This is a device I bought that I can't figure out how to use and this video is the only instructions out there but they are in Mandarin. ( I think) can you please translate how to operate the product? I will let you know if your translation has success as I have the unit with me to test. It is quite simple but there is something I am missing. There are 6 buttons on the unit. and the purpose of the product is to ) control the rotation of 2 RC motors. 2) set A and B points of the motor so that the rotation only falls with the the proximity of A and B points.