In order to publish a video with closed captions, you need to set up a Kaltura player with captioning functionality. 

Step 1- Log into your Kaltura account

Step 2- Create a new player

At the top of the page, select the Studio tab and create a new player by clicking +Create player --> Light player:

Step 3- Navigate to Subtitles and Transcriptions

Under the tab on the left, as represented by "capabilities", select Captions default display and check 'Display captions':

Step 4- Click Save Player Changes

Next step-

Upload your Kaltura videos to 3Play Media from your KMC

or

Upload your Kaltura videos to 3Play Media from your 3Play account