HTML source is a way to embed the video on to the page.
It allows you to customize behavior on-page you are using it as you see fit.
Below is the code.
<video oncontextmenu="return false;" controlslist="nodownload" controls="" poster="https://media.publit.io/file/w_1280/dragtesting/tummygummy.jpg" playsinline > <source src="https://media.publit.io/file/h_480/PublitioTutorials/Publitio-Media-Files-Introduction.webm" type="video/webm"><source src="https://media.publit.io/file/h_480/PublitioTutorials/Publitio-Media-Files-Introduction.mp4" type="video/mp4"><source src="https://media.publit.io/file/h_480/PublitioTutorials/Publitio-Media-Files-Introduction.ogv" type="video/ogv"></video>