Your club link
It changes nothing else: what you have ticked as learned, the grade you hold and the grade you are working towards are yours. Everything is stored on this device, sent nowhere, and changed any time in My progress.
Club links
Make one link for your club. Your members open it and the reference is set up the way you teach: the demonstrations you have chosen, and only the grading pathways you follow. Nothing is sent anywhere, so you never learn who followed it and they are never asked for anything.
Your club does not need to be known to this site. Type its name, choose the videos, and the link is yours.
Build your link
Shown to members when they arrive, so they know where the link came from. Optional.
Plays first wherever they have filmed one; the next available plays where they have not.
It works on any page too: put the same ?provider= and &schemes= on a technique's address to send members straight there, already set up.
For the dojo wall
The same link as a code. It follows what you have chosen above, so print it once you are happy with the link.
Scanning it sets a phone up exactly as the link does, and says so on arrival with a way to undo it.
Vector, so it prints at any size without going soft. Leave the white border around it: scanners need it to find the code.
Not building a link? Rank every provider yourself on the video providers page, or pick one in your profile.