title says it all

Yes. Using SteamVR Mirror is the only current way to make sure a run isn't spliced. Maybe only require for top 3 though.

I vote yes. The more that is visible to the veiwers/verifiers, the more legit the run is.

OK, thread closed, you are now required to use SteamVRMirroring to record runs, all future runs not doing this will be rejected.