Test scenario
Login as admin.
Go to Administration Site > Plugins > Filters > Display H5P
Expected result: You have to see this description below the textarea:
Default:
https://h5p.org/h5p/embed/[id]
A list of URLs from which users can embed H5P content. If none are specified, all URLs will remain
as links and not be displayed as embedded H5P content.
'[id]' is a placeholder for the H5P content ID in the external source.
Description
It seems that this issue MDL-67146 has removed the new string for allowedsourceslistdesc (filter displayH5P) with the old description.
So, we need to add the new description which was introduced in MDL-67110.