Interactive Video

I have a question regarding the Interactive book fullscreen.
I noticed the contents inside the book don't always resize with the IB container. For example, if I click on the fullscreen tag, the video type will scale up with the IB, fully takes up the container width. but the interactive video won't do that, it just dangles up there, makes the layout looking pretty strange. 
A similar thing also happened with Find Multiple Hotspot. It seem that the resize event either doesn't trigger the content to fully occupy the width upon resizing. 

Hello,

I have my own implementation of H5P on Moodle 3.9 and I was try to use interactive video.

Sorce of this video is our video portal where video is stored as .mp4.

If I use video via URL https://video.arnes.si/portal/asset.zul?id=J1McUIADZWgoFVATVZwUylhA
video can't be recognized. But If I first download this video and than upload from my computer,
video is normaly recognized.

How can I overcome this?

All the best, Ivan

We are in the process of upgrading our H5P from vs 1.19.1 to 1.21.0

We are using Totara Learn version 12.23

In our current version everything works well with our H5P activities.  I am now testing  them in vs 1.21.0 and am encountering issues regardless of browser; an am using a laptop.

My interactive videos have the message: "Cannot read file. Either the file does not exist or there is a permission problem"(image attached) above them, but they do work.