I showed the movie page to a non-Wikimedian and they said that they could have easily missed the arrow to play the video. Can we make the arrows in https://github.com/wikimedia/mediawiki-extensions-TimedMediaHandler/blob/master/MwEmbedModules/EmbedPlayer/resources/skins/kskin/images/ksprite.png have higher contrast to be more obvious against dark backgrounds and/or grayscale videos?