From a web dev perspective, It should be easy exceedingly easy to put a favourites link somewhere on the site since the page is already there, just to make things easier for people. That could be anywhere, in the header, in the user's profile, or in the courses drop down, just as a stopgap until it can be built how you want, considering it was there in Apr 17 and there's still not a place that links to it yet (not having a go, just saying a small link somewhere make life easier for people to discover that feature which would save them time and be a better experience).
Re the recently watched, it would be awesome if that could show the last viewed video from the last few courses I've watched, I tend to get bored if I watch a single course the whole way through (even in multiple sessions) so I usually do a bit of one, then another, then return to the first, then the second.
Like this example from another site:-
I can sort by recently access, just showing favourited courses, and the third filter can show only courses that are in progress, not started, or completed. This allows me to look and instantly find "that course I was doing last week"