When I play an embedded streaming, I notice a left/right arrows appearing for few seconds on the central part of the player . Do you know where they can come from?
Are you sure it’s not something in your player or in the web page? Can you post a screenshot?
I’m quite sure it’s related to Wowza player. They appear while loading the streaming, then disappear when stream starts, so they stay on the screen for few moments or some seconds (it depends on the connection you have)
You can try to inspect the element with chrome developer tools. Select the element and copy all the HTML shown in the dom window. Then you cans check it’s css selectors and determine if it is indeed from wowza player or if it comes from somewhere relevant. If needed slow down the page loading with some other tool and that will give you more time to capture the information before the video gets loaded.