Is there a particular reason you couldn’t use events that run an action group?
Let’s say your video is 18 seconds long (as above) and you have your three questions on the same page. You want a question to display at 6, 12, and 18 seconds:
Event 1: Run Q1 Action group
Action group 1: Pause video; show Q1
Q1: however you want the question to be have on answer – use a “Submit” button to answer the question, then resumes the video, and hides Q1.
Rinse and repeat for as many questions as you want, depending on the space you have for the video and the page. If you want, I can try and get some time to build a sample.