Not for me, for example I've been watching a few PyCon and I/O talks, and it's been showing me other interesting PyCon talks that are highly ranked. It's also giving me good AutoChess and OneHourOneLife Let'sPlays, both of which I've been very interested in lately.
All three things I just mentioned are fairly niche, comparatively, yet it knows that I've been watching a lot of them lately and is giving me more of it.