type: string
description: >-
  The length of the video. The property value is an
  [ISO 8601 duration](https://en.wikipedia.org/wiki/ISO_8601#Durations). For example, for a video that is at least
  one minute long and less than one hour long, the duration is in the format `PT#M#S`, in which the letters `PT`
  indicate that the value specifies a period of time, and the letters `M` and `S` refer to length in minutes and
  seconds, respectively. The `#` characters preceding the `M` and `S` letters are both integers that specify the
  number of minutes (or seconds) of the video. For example, a value of `PT15M33S` indicates that the
  video is 15 minutes and 33 seconds long.


  If the video is at least one hour long, the duration is in the format `PT#H#M#S`, in which the `#` preceding the
  letter `H` specifies the length of the video in hours and all of the other details are the same as described
  above. If the video is at least one day long, the letters `P` and `T` are separated, and the value's format
  is `P#DT#H#M#S`. Please refer to the ISO 8601 specification for complete details.
nullable: false
example: 'PT13M43S'