Final answer:
Speaker labels and time-stamps are essential in transcriptions and video editing for clarity and reference, and they should usually be enabled.
Step-by-step explanation:
Speaker labels and marks with time-stamps in transcriptions and video editing should usually be enabled to provide clarity, assist with editing, and offer a precise reference for when speakers change or for specific dialogue in the recording. These elements are critical in professional video production, interviews, legal depositions, and anywhere that clear communication and referencing are necessary. The exact requirement may vary by the project's purpose or instructions provided; therefore, assessing the context in which they are used is important.