I have proven myself it works very well!
I've taken up a new hobby which is learning astrology and tarot and, as I'm always worried about improving my skills, decided to do so through youtube videos in English. To my surprise it ended up being a great exercise because the subject is really open, in terms of vocabulary. Of course, they deal most of time with feelings and psychological descriptions, but everything is possible to be discussed in that universe. I listen to at least one everyday, and I'm finally getting confident my listening skill is teacher level.