If you'd prefer your (embedded) video to autoplay, go to the video player settings. Here you can select autoplay behaviour of your video.
Save the settings and your video will automatically start.
Another option is to add this option manually by adding a parameter to your embed code or video URL:
If autoplay is enabled, your video will start without sound. Most browsers block autoplay with sound for all videos, including interactive videos. Therefore only muted autoplay is available. Your viewers can manually turn up the volume.