How can I control the speed of audio or video playback? April 27, 2021 02:29 Updated Playback speed control is supported in the mobile apps as illustrated below. Related articles Experiencing problems with audio or video on our web site? Overview of the combined video, audio, and PDF (Notes/Links/Transcripts) web and app pages Where can I find additional supporting information regarding vaccines? How do I control audio or video volume? Mobile and TV Apps Available