Investigators said Friday that they believe sparkling candles atop Champagne bottles ignited a fatal fire at a Swiss ski resort when they came too close to the ceiling of a bar crowded with New Year’s Eve revelers. This video shows guests apparently failing to react to the fire. Authorities planned to look into whether sound-dampening material on the ceiling conformed with regulations and whether the candles, which give off a stream of upward-shooting sparks, were permitted for use in the bar. F