You can tell whether or not your recording has interactive questions and/or captions added by looking on the 'Video Features' section on the Video Management Page for any given recording.
Note: The Video Management Page will come up when selecting the recording you'd like to use from the My Videos page. Check out this walkthrough for a reminder on how to pull up your My videos page.
The features will be highlighted in blue for any feature that has been applied to that recording and grey for the features that have not yet been added.
If you would like to add interactive questions, you'll want to click on the 'Interactive Questions' icon and it will take you to a page that allows you to add questions to your video. Similarly, if you would like to add captions to your video, you'll want to click on the 'Captions' icon which allows you to add captions to your video. Once added, the icons will be blue as shown below:
Once these features are all activated on a recording, you are able to click on the Interactive Questions icon to edit your video's interactive questions, and the Edit Captions icon to edit your video's captions.