The controls attribute adds video controls, like play, pause, and volume. The text between the <video> and </video> tags will only be displayed in browsers that do not support the <video> element. There are three supported video formats: MP4, WebM, and Ogg.
Autoplay
To start a video automatically, use the autoplay attribute.
Muted autoplay
Add muted after autoplay to let your video start playing automatically (but muted)
Audio
autoplay
autoplay muted
Youtube video
autoplay, mute (autoplay=1&mute=1)
YouTube Loop
Add loop=1 to let your video loop forever.
YouTube Controls
Add controls=0 to not display controls in the video player.