How do I get branching course to continue

Do you want a Next button to appear after all buttons have been clicked at least once? Or just go to the next slide automaticallyN

Anyway you'll need to create 9 user variables, one for each button. I will label them v_one, v_two,......v_nine. You can give them a default value of 0.

For the buttons you can use a standard shared action with two commands:

    Assign v_one with 1

    Jump to slide video1

I put the parameters to be defined italic: the user variable and the slide label or number.

For the On Enter event of that menu slide you create a conditional advanced action:

IF v_one is equal to 1    AND

     v_two is equal to 1    AND

    .....

     v_nine is equal to 1

Show Bt_Next                            if that is what you want, or you can replace by

Go to Next Slide                         if you want to happen this automatically