Hi Victoria,
I’m not certain what you’re looking to do with the two URL paths, e.g. /p1k-course/ vs /course/. Maybe one is public for SEO and marketing and the other is the gated private course?
Either way I think the core of your question was about how to build a dynamic navigation that can play the specified video without changing the URL.
To do that you’ll need to use script to detect the, click pull through the appropriate youtube video ID, and update the player embed. I’d probably look at using a 3rd party player in this case as it might be more scriptable and configurable.
Nelson ( @PixelGeek ) did a video this week on how to create a version of this that matches the webflow U styling. It’s below and may have some good ideas to help you.
If you need help with the programming, I’m just finishing a project and I do microconsulting for a lot of my clients. I work fast but delivery-tomorrow may be a bit tight.
Also, if you switch to the CMS and Lesson-based-page approach, you’ll get specific Lesson URLs you can share. But that depends on your UX goals.
I use that approach here-