Sure, but there’s a glitch, when you add the code in a HTML widget and export everything is fine.
But after export Blocs remove the autoplay="" tag which you have to add back manually each time you export.
I don’t know if it’s a bug or meant to work like that.
I dropped a HTML widget and then pasted the code in the attached text file.
One is for the autostart, loop video and no video controls.
The other is for autostart, no loop, video controls.
Download this text file with the code
The autoplay don’t work on mobiles, nothing you can do about that.
And the new Safari seen on Apples last week WWDC has a setting to detect and stop auto starting videos.