Stranger to Reality
I wouldn't mind the muted autoplay if the mute button was visible on the video so they would at least have the option to unmute it. The only way they can unmute it right now is by making the video fullscreen, and most people don't know to do that. Right now the videos only show the play/pause button and no mute or volume option. I tried using code to resize the video to see if it would make the buttons appear, but none of my resizing codes are working. The video is stuck at one size.
The mute button / volume control only appears when the player is a minimum of 300px wide. On a V2 profile, that means by default only the second column is wide enough to display the player at the required size. Since your profile does have a custom theme that makes the parent column wide enough, try this:
.media_panel iframe {
width: 100%;
height: 200px;
}
You can set the height however you like, of course.