did you ever figure this out, looking for those specific notebooks myself? I'm not sure if this is helpful, but in the Databricks free edition home page, there is a Databricks fundamentals course, which covers similar things (it is not exactly the same course as in the Learning Plan), but there you are able to access notebooks for that course (there are buttons to click to download materials when you go through the course). I'm wondering if the videos in Learning Plan are from a similar within-databricks course, where you could have accessed those notebooks...