How to Set Up Live Auto Captions for Zoom Webinars 🎙️

Follow this guide to schedule Live Auto Captioning for a Zoom Webinar once it has been scheduled within Zoom and once Zoom has been linked to your 3Play Media project.

lecturer giving a presentation

➡️ Step 1: Schedule a Live Auto Captioning Event


3play media my files page


Navigate to your 3Play Media account and click Live Auto Captioning.


schedule new event section in 3Play Media


Under the Schedule New Event section on the right, select your Zoom integration.


➡️ Step 2: Schedule Webinar in 3Play

schedule live webinars page


The webinar that was scheduled in Zoom will display.

Check the box of the Zoom webinar that needs Live Auto Captioning, enter a start time and date, and click Submit.

NOTE: The scheduled time for the Zoom webinar will appear as the default time displayed in 3Play, but any time can be selected. The time selected here will be the earliest that 3Play Live captions can be used on this webinar. This is the time that the 3Play live server will become available, and if a time for the captioning event is set after the start time of the webinar, the captions will not be available at the start of the Zoom webinar. In order to make sure everything is up and running in time for the participants to enter the webinar, it is best to schedule the 3Play captioning event at least 5 to 15 minutes before the scheduled time of the Zoom webinar.

Event are scheduled using Eastern Time unless the Time Zone Module has been activated and a new timezone has been configured at the user level.


➡️ Step 3: Copy Caption API Token for Zoom Webinar


closed caption button on zoom meeting


After scheduling both the Zoom webinar and the 3Play Live Captioning Event, start the webinar and click the CC Closed Caption button.


copy the API Token page in zoom


Click “Copy the API token“.


➡️ Step 4: Paste the Zoom API Token for the Zoom Webinar into 3Play


scheduled live auto captioning events on 3play media


This webinar should appear under the Scheduled and In Progress Live Auto Captioning Events section of the Live Auto Captioning page.

Paste the API Token from Step 1 into the Caption Ingest URL field and click Update.


➡️ Step 5: Live Stream Webinar and Begin Captioning


more option in zoom meeting


Once it’s time to begin the webinar, initialize the webinar in Zoom and once the client is active, click More > Live on Custom Live Streaming Service.

Important: You must do this at or shortly after the Live Event start time scheduled in 3Play. If the event in 3Play is scheduled for 3:00 pm but you attempt to go live at 2:58 pm, the 3Play live server will not be ready and the webinar will not be able to go live. Please wait until the 3Play Live captioning event start time to try again, and refer to the instructions in Step 2 of this guide.


➡️ Step 6: Enter Live Stream Credentials When Prompted


live steam the zoom webinar to a custom service section on


You will be prompted for a Stream URL and Stream Key, which can be found on your Live Event Details page in your 3Play account. For Live streaming page URL, enter or any website. This field is required but the value has no bearing the zoom meeting or the live captions.


scheduled live auto captioning events tab in the account system


After going live, a web page will open up and ask for these details, which can be found on the 3Play Live event in the 3Play account system.

Captions should now appear within 5-10 seconds.


message in zoom that says unable to live stream to the custom service


If you get a message from Zoom such as the one below saying “Unable to live stream to the custom service”, please confirm the correct Zoom API Token was pasted into 3Play in Step 4. If so, Zoom is likely encountering high traffic, and captions will likely appear within a minute or two.




➡️ Return to Full Zoom Live Auto Captioning How-To Guides

Add Captions to Zoom Recordings

How-To Guide: Learn how to add captions and transcripts to Zoom Video Conference Recodings.

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