Many organizations block content from platforms such as Youtube. As a result, if the course contains links to videos on such platforms, some learners can't access them.
To avoid such challenges, Gateway Academy recommends that videos uploaded on the platform. This also allows for learners with low bandwidth to download them and watch them offline.
Make sure that the video files are not too heavy, as such videos take a long time to load/download for learners with slow internet connection.
The video below provides more information on how to create video assets when building a course.