The timely offset of each subtitle forms the property key for the details (subtitle
duration) given below. The timely offset is the timely offset in seconds or fractions of seconds from the start of the recording. When the user pauses the recording, the time during which the recording is paused is not considered when showing a subtitle. For instance, when a subtitle’s timely offset is 42 seconds, but the recording is paused after a mere 30 seconds have passed, we will only show that subtitle 12 seconds after resuming the recording.