Great video, Things!
Mine flickers pink/blue sometimes on starting and also glows at the filament supports when starting and sometimes when running. I think the seller might have tested it with it vertical as there -was- sodium at the filaments, but most of it has moved away now. It's still running fine though and I suspect it shall continue to to nearly full, if not full lifetime.
My lamp throws off a decent number of blue spectral lines from the argon fill gas, so I can still distinguish blue from red with the light most times. If you have any red laser goggles (blue glass) put them on and look at the lamp.