Hi Claire,
There is a great plugin that can be found here: https://moodle.org/plugins/mod_hvp
With H5P you can add videos to your site and then add a layer of interactivity on top of them through the plugin.
Its very simple and well made, its developed for Moodle and links in with the grade book. I have been using it over the last year and it is fantastic, it also kept up-to-date and running for Moodle versions up to 3.4.
Hope this helps.
Cheers
Callum
P.S Its free!