Video 4K Video
Video is nothing the shooting of a motion objects.
Video can be taken in different format and in different resolution in pixels.
For examples HD video means- 1280*720 pixels
FHD means 1920*1080 pixels
4K Ultra HD means 3840*2160 pixels
4K Digital Cinema Initiatives (DCI) means 4096 × 2160 pixels
Slow motion video
Slow motion video or Slo-mo means ability to capture movie in slow motion. In slow motion videos time appears to be slowed down in movies taken by the mobile.