Hi Nick,
There is now a way to host the lessons on our servers. You can find the instructions on how to do that in the Help > Video Tutorials > Getting Started 6: Publish a Lesson. Here's a link directly to that video -
https://www.youtube.com/watch?v=tbA8gHvF5bYSee the attached screenshot. Basically after publishing, you have an option to upload it, and it will be uploaded to the Portal site, where you can share the link, or manage access (or remove it when you're done).
Also, as you've seen from your testing, we've fixed the bugs around showing multiple videos on iOS, so that should all be working now.
Hope that helps!
- Nav