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Yeah, it does kinda look like Barkhausen interference, but I've never seen it look like that before. That looks more like a video signal interference than the Barkhausen interference, especially since you can only see it in light scenes or whatnot - Barkhausen interference tends to be always there, and like Einar72 said, it's typically black. Another cure for Barkhausen interference is to just swap horizontal output tubes around until you find one that doesn't oscillate.
But I'm still betting on ghosts. The dead have a way of interfereing with television reception. <grin>
-Ian
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