This is the icon for “Trending” in YouTube. It is symbolizing “fire”, probably representing “fire” or “hot”. If you click on the trending, it will jumped to the page showing the recently hot videos. The fire icon in YouTube metaphor is widely recognized in modern culture to mean something is “hot” or popular, thus giving this icon an instant understanding among users. The metaphor for the YouTube “Trending” icon is direct and modern: fire equals heat, and heat equals attention or excitement.

The fire pictograph in Mayan in the another hand, probably only presenting bonfire. The fire pictograph is having lots curves, and be blowed from the right toward left.