Outstanding youtube videos for learning some of the basic vestibular tests with abnormal findings

Dr. Peter Johns is an Emergency Department Physician who makes outstanding videos of vestibular problems he sees in the ED.  He is my latest vestibular hero!  Here are a few of his great videos: 

Gaze hold and torsional upbeat nystagmus (Both central and peripheral cases revealed)

Head Impulse (AKA: VOR to rapid and slow head movements and Head Thrust Test)

Which major vestibular diagnostic category would you assign to these clients?

Using the following major diagnostic categories (as described by Bhattacharyya, Neil Et Al 2017): Acute Vestibular Syndrome, Triggered Episodic Vestibular Syndrome, Spontanoues Episodic Vestibular Syndrome, or Chronic Vestibular Syndrome, which classification might be most appropriate to assign to the following clients?

A:

B.

C.

D.

Bhattacharyya, Neil, et al. "Clinical Practice Guideline: Benign Paroxysmal Positional Vertigo (Update)." Otolaryngology - Head and Neck Surgery, vol. 156, no. 3_suppl, 2017, pp. S1-S47. OhioLINK Electronic Journal Center, doi:10.1177/0194599816689667.