I jumped on it because this is a hot subject for me.
Too often a crew is mislead into landing on the wrong runway, or on a parallel taxiway. Lufties at KTW on new RWY being build, AF at Casablanca, Seattle, Pisa, .... happens way too often by lack of appropriate marking/lighting/Notams, ...
But in the present (well a few years old though
) I don't understand the title of your post.It seems to point to an FC error and there is none.
SN did NOT land on a taxiway.
They landed on the RUNWAY.
It is marked as such, has a PAPI, has an Approach Lighting System.
Fortunately, the content of your video gives full credit to the SN crew.
Thanks.
H.A.