Falling rain is a synthetic particle system that slow falls  in slow motion as slow moving clouds drift across the screen. Download this free motion background in 4K or HD resolutions.

4K – 3840X2160 (H.264 Mp4)
File Size: 89 mbs
Clip Length: 30 seconds
Seamless

HD – 1920X1080 (H.264 Mp4)
File Size: 73 mbs
Clip Length: 30 seconds
Seamless