Rather than using this trigger:
Use "Hide this layer ... " trigger.
But that only helps for one option. It's tough to pause a video and not restart it if you are visiting other slides while it is stopped.
Using a lightbox like the sample might work for a single choice. You can use the variable to branch in the future.
But if you are making several choices, and then branching from each of those into a series of different slides, you are going to be happiest if you cut the video into sections, with a decision point at the end of each break . Then after the branching is done, jump to the next section of the video.
