Vimeo Pro users are able to remove the play bar, or controls, from appearing on their embedded videos inside Zaption.
When logged into Vimeo, go to Settings, click on the Embed tab, and select Always Hide on the Player Preferences. This will prevent any controls from showing on top of the video. You can remove everything except a small rollover play button.
Go to Account Settings and select this as the embed preset if you would like to make this the default setting for all of your videos.