Not the parent, but most any browser should support this for basic videos. And with JS disabled I think it's only basic videos you'll see.

That is, any <video> HTML element can be right clicked and downloaded, at least in Chrome and Safari where I tested. Interestingly this even works when for `<video controls controlslist="nodownload" ...>` elements where the developer tries to prevent downloading. (in Chrome that removes the download option from the video player's controls, but not from right-click)