unitTimescaleInMilliseconds

Specified as the number of milliseconds in one unit timescale. For example, if you want to set a start_in_units at 30 seconds, you would use a value of 30 when using the unit_timescale_in_milliseconds in 1000. Or if you want to set start_in_units in 30 milliseconds, you would use a value of 30 when using the unit_timescale_in_milliseconds in 1. Applies timescale to start_in_units, start_timescale and presentation_window_in_timescale and live_backoff_in_timescale.