The five-member commission will vote Friday on the proposed rule change, which will apply specifically to clips that have already appeared on TV with captions and would follow a similar, 2012 rule on full-length videos.

"The commission previously adopted closed-captioning requirements for full-length video programming online," he said last month. "I proposed … we go further and require captioning for video clips that end up on the Internet. Those who hear with their eyes should not be disadvantaged in their ability to access video information on the Internet."