Try not to think of what "key....the bassline is...." in, but hear what chord feels like the Tonic/Home key.
I HEAR this tune in mostly Cminor, as the G7+5 conveys a strong gravitational pull of V7 - i7 (in Cminor).
Below are the chords of the (verse?) starting at 0:32 of the track. (The next section - chorus?- at 0:54 is similar, with a momentary(?) Tonicization of Dbmajor, but still in Cminor to my ears.)
Another possible harmonic analysis might advocate for the verse in Bbminor and the chorus in Dbmajor, but I wouldn't buy that....
I don't think this song is in ONE Key. That mode(!) of thinking and hearing is not useful in the 21st century, and hasn't been for some time.
IMFO, of course.
See below.
Thanks.
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