Hello. You did not inform the video to which this question refers, which makes it impossible for it to be answered. However, I will try to help you in the best possible way.
In a video, the speaker is the one who is narrating the video, presenting the information that the video contains. To determine who the speaker of the video is, you must identify how that speaker is related to the context of the video, that is, if this vice is talking about science, the speaker can be a scientist, a teacher or a researcher. If the video talks about theater, the speaker can be an artist, an actor, a director, or another professional related to it.
