"Description" question type for Quiz
There is a question type called "Description" in Moodle and I believe that a similar question type would greatly enhance H5P Quiz.
As the name displays, this is not a real question (therefore, there is no grade for it) but a text field that can be placed anywhere in the test, even between questions. It is very useful to give instructions for following questions, and to switch to a new section in the test. It also becomes possible to add a reading text or even an audio or video file (provided that the option of adding audio/video is enabled in H5P editor, of course) for questions that follow this "description"; students read/listen to/watch the content in the "description" and move on to the next questions after that.
(See https://docs.moodle.org/311/en/Description_question_type for brief documentation for "Description")