Video Cross-browser

I need to use a video and it has to be cross-browser . It works on Google Chrome, Opera and Mozilla, but it fails to appear in Safari. Here is my code:

follow the html code:

        <div id="video">
            <video id="Video1" width="100%" height="100%" loop>
                <source src="video/League-warrios.mp4" type="video/mp4" />
            </video>
        </div>