javascript issue – height 0 with html5 content

Hello,
I meet the 0px height issue with some content created with h5p.org.
I asked on their forum, and happyly they seem to have a solution : http://h5p.org/manipulating-h5p-with-javascript
However, I’m not sure on what to do to make it easy with tabby.
Could you help?
Thanks in advance for any suggestion

https://wordpress.org/plugins/tabby-responsive-tabs/