Installation and server related problems

Hello! I can not find the way to the hub to download content types for Drupal 7?

I want to download the file 

I watched the video https://www.youtube.com/watch?v=EIAAtxvD9MM

We have an installation of h5p that sits behind a reverse proxy.

This code on line 1998 of h5p.classes.php causes many things such as the video controls in the video player to break:

Hello! I just installed the plugin on two different WP installations on Siteground. 

I can't use the plugin at all: I can't connect to he hubspot and, when I try to upload a h5p file, I get the message: "Invalid library".

On the "libraries"  section, I get no libraries installed at all. I uploaded the attaced h5p file and installed some libraries, but still my plugin doesn't work at all.

Find attached the console error in a screenshot.

Is there any way you could help me? This plugin will definetely be useful for my English School. Thanks!