The video explains lenticular clouds, which are lens-shaped clouds often found near mountains. They form due to wind patterns and can appear stationary. These clouds are known for their unique shapes and can be mistaken for UFOs. They are also called standing wave clouds and can indicate turbulent air, which is important for pilots. The video also introduces pileus clouds, a brief type of lenticular cloud that forms over rapidly growing cumulus clouds.

What new insight or understanding did you gain from this video?