Vimeo embedded videos not working?

After checking and rechecking with extensions sidewise turns out to be the culprit. I believe this extension is adding some extra parameters to the embedded video url. I checked the normal embedded code then compared the inspected code from the page the video was in itself between chrome w/o only sidewise, chrome w/ sidewise and chrome incognito. Only the chrome w/ sidewise added this extra bit "&api=1&player_id=vimeo-67494963" to the video url.

Can you confirm sidewise is doing this?