Video creation method

An imaging device comprising:

• an image sensor configured to output pixels signals corresponding to a plurality of pixels;
• a control circuit configured to:
• read out the pixel signals from the plurality of pixels as a first recording function,
• create a video of a first angle of view at a first thinning-out rate, and recording first video data;
• perform a detection of a target subject from the video of the first angle of view;
• and
• in a case where a target subject exists within the first angle of view, create a video including the target subject and having a second angle of view smaller than the first angle of view at a second thinning-out rate lower than the first thinning-out rate and recording second video data as a second recording function,
• wherein imaging by the image sensor is repeatedly performed for each unit imaging period,
• the first recording function and the second recording function are configured to be performed in the unit imaging periods different from each other, and
• in the unit imaging period in which the second recording function is performed, the pixel signals are output from a plurality of phase difference pixels included in the plurality of pixels, and
• adjust a focal position during imaging based on phase difference information according to the pixel signals output from the plurality of phase difference pixels, wherein the video having the second angle of view has a higher resolution than the video having the first angle of view.