Content creation

Hi all, we have a need to remove the "video upload" portion of interactive video library and only allow people to use videos hosted on YouTube and such. Is there a quick way to do this by editting the library to take that function out, or restrict it based on drupal permissioning? 

In the future I would like to write a drupal module to do something like this if one does not exist, has anyone done anything like that in the past? Are there examples of custom Drupal modules that people have done beyond adding custom CSS to libraries?

Thank you for all your help

Roman

Can anyone recommend optimum image deimensions for 'Course Presentation' without a key word list, so full screen image style like this example 

New user here.

In creating "course content," I find that I want to  change the order of slides in a lesson.  I don't seem to know how to do that.

I'm using H5P in an Opigno (Drupal) installation.

Is this possible?  If so, how might it be done?