Interactive Video

I have tried looking through the XAPI guide and this forum, so apologies if I missed the answer to this question already.

I have created interactive videos with button that work really well, but I would like to also add some text to the video at a certain point - for example "Hello Tony, thanks for completing the tutorial" and be able to replace Tony with either a passed variable, or dynamic field that I can send via the API.

Is this feature available?

We are using the H5P plugin on moodle. Content developed in H5P with the Interactive Video plug-in is not visible to students. Although administrator accounts can see this developed content very well, students cannot. Even the buttons do not appear in the interactive picture. What do you think is the problem? I'm waiting for your help. Thank you.