If "doppler boost" is regions that are moving towards us, then they presumably aren't swirling around the BH at near-light speed?

Is the ring of light the accretion disk or not? If it is the accretion disk, why is some of it moving towards us?

And why does it seem that the ring of light is oriented perpendicular to our line-of-sight? Is that really coincidence? Don't most accretion disks rotate on roughly the axis of the host galaxy's rotation? If we're looking directly at one of the poles of the BH, shouldn't we see some sort of beam pointing right at us?