We can use Cloudinary to load a better video format.
Like the images, with the console we can edit video to select format auto and get the URL.
f_auto,q_auto
<video autoplay="" loop="" muted="" class="custom-video" poster="">
<source
src="https://res.cloudinary.com/nucliweb/video/upload/f_auto,q_auto/v1677268438/workshops/t3chfest-2023/video/production_ID_3769033.mp4"
type="video/mp4"
/>
Your browser does not support the video tag.
</video>