This is definitely purple streaking (or smear) in the CCD sensor. It is a sensor artefact due to saturated pixels. By the way, your video is a very good demonstration! When the camera meters the light in the room, the chandelier is over-exposed and saturates the pixels. When the chandelier is metered, the room becomes darker, but the pixels no longer saturate.
Purple fringing is something different. It occurs at the edge of high-contrast areas (e.g. photo of a tree against a bright sky) and is a lens artefact that has to do (to my knowledge) with shorter wavelengths (purple and blue) being refracted more strongly.
OK, back to CCD streaking - how can it be controlled? By
a) avoiding spot sources of light
b) using a neutral density filter when shooting video in bright light (*)
c) possibly setting a slight under-exposure, e.g. -0.3 EV
* A UV filter won't do, because you have to physically decrease the amount of light entering the camera, to prevent sensor saturation.
For my part, currently I don't have a ND filter, so I'll simply try to work with EV compensation when there are bright spots of light. Whatever you do, you must try to clip the light from those spot sources just the right amount so that saturation is prevented.
We've just discussed this subject at Steve's Digital Camera Forums, and dpreview.com also has a thread on it:
http://forums.dpreview.com/forums/read. ... e=33114322