Installation and server related problems

Hi, i am usiung h5p plugin for wordpress and the actual wordpress-version 5.4.1 reports in the plugin list:
compatible until 5.3.3
this plugin is untested for your version of wordpress.

Question 1: Is is unsafe to use h5p on the current wordpress 5.4.1?

Question 2: Or do I have migrate back (all the other plugins, theme-development, ...) to the last compatible 5.3.3 Version?

First: I will understand if you don't release this post to the forum for commercial reasons.

A while back I seem to remember stumbling upon a Github page holding lots of H5P development code, and vaguely remember seeing there what looked like the code for a server.

My question is - Is it possible to "self-host" a H5P server to work in the same manner as H5P.com? ie LTI integration

The Reason: My institution uses Canvas and there is absolutely no way they will/can afford the cost of H5P.com

Hello,

Here is my problem

Steps to Reproduce

• create an h5p activity on a course
• select the "interactive video" or "drag and drop" or "360 virtual tour" module
  the editor does not appear, it always runs with "loading in progress"
• Others  modules works like "Multiple choice", "Column", "finds the words" ...

Platform - Moodle (3.6.4)

Device - All devices (Desktop and Mobile)