Add fireplace bg-video

static/media/bg-video.json

     "ocean-waves.mp4": "ocean waves from above. mid-sea. no shore or horizon",
     "stairway.mp4": "a stairway to heaven",
     "candles.mp4": "3 burning candles",
+    "fireplace.mp4": "lit fireplace with 2 candlesticks on each side",
     "colorful-smoke.mp4": "colorful smoke swirling on a dark background"
 }