Hi Daniel,
Thank you so much. It worked for me!
The only thing I had to add, was some CSS in my theme to make sure that the H5P-content would display correctly on the screen.
I then added the H5P-content through a ''description''-question type in the question pool and put the embed code there through the atto editor. Once I added this description question to my question pool, it all worked fine.
I'm guessing this only goes for my particular case, as I used a large image, but I thought I'd share it nonetheless for people who might encounter this as well.
Once again, thanks for this great addition. It works fine in Moodle 3.6 as well.
Kind regards,
Menno