These videos are an excellent resource!!
One administrative comment that would be good to add at the top of the page is to point out that these videos are context relevant to when R80 was first introduced (i.e. R80.0) and before R80.10 was released. Consequently there are a couple features that these videos indicate are not available, that have in fact become available as a result of more recent revisions released. It does not detract from the value of these lessons as the architecture and methodologies remains the same. I just thought it would be helpful to add this as a notification.