Do these site support HTML5?

I want to be able to show an interactive video on my site not sure if it’s suppported

Hi,

The Wix editor is built on HTML5 but if you would like to add some HTML to your site, like an interactive video, you can try using the HTML element to write some HTML code to display the video. Click here to learn more about using the HTML element on your Wix site.

Best regards,
Edward | Corvid by Wix

Thankyou for your responce, I messaged wix and they said they use to do it but not now, recommend I ask you, are you different t to wix then?