Sorry if it's been mentioned before, but I have never seen it done by anyone else...
Basically the glitch means you can perform an emote while running, sprinting or jumping around. For instance you can be sprinting around playing the lute, or the drums etc.
One thing that should be mentioned is that it won't appear on your screen as if you're performing these actions, it'll only be visible for others (atleast for mine and my friend's experience)
It's performed by bringing up the emote 'wheel' and choosing your desired emote (R on the D-Pad) while you are sprinting...
Pretty funny anyways we have attracted some impressive crowds in daggerfall kowtow-ing about.
Only used PS4 so no idea if it happens on other systems...