This is a Brightcove setting.
In your Brightcove Video Cloud account.
- Click the Publishing tab.
- In the Players section, select the player you want to edit, click Settings.
- Click the Video Player tab, check the Auto Play box.
If you have used the URL of a Brightcove video using this player to create your HapYak project, the Auto Play configuration will automatically be reflected in your HapYak project.
If not, simply grab the URL or the embed code of the video from Video Cloud and replace the Video Source of your HapYak project (Configure, Video Source).
More detail from Brightcove on Auto Play is here.