The <video> element embeds video natively without plugins like Flash.
src — Video file URLcontrols — Show playback UIautoplay — Play on load (needs muted in most browsers)loop — Loop the videomuted — Mute audioposter — Thumbnail image shown before playingwidth / height — Video dimensionsYouTube videos are embedded with an <iframe>, not the <video> tag.
<!-- Basic video player -->
<video src="video.mp4" controls width="640" height="360"></video>
<!-- Multiple formats with poster image -->
<video controls poster="thumbnail.jpg" width="640">
<source src="video.mp4" type="video/mp4">
<source src="video.webm" type="video/webm">
Your browser does not support video.
</video>
<!-- Autoplay muted loop (for hero backgrounds) -->
<video autoplay muted loop width="100%">
<source src="background.mp4" type="video/mp4">
</video>