<video controls>
<source src="foo-large.webm" media="(min-width: 800px)" />
<source src="foo.webm" />
I'm sorry; your browser doesn't support HTML video.
</video>
This example demonstrates how to offer an alternate source file for viewports above a certain width. When a user's browsing environment meets the specified media condition, the associated element is chosen. The contents of its src attribute are then requested and rendered. If the media condition does not match, the browser will move on to the next in the list. The second option in the code below has no media condition, so it will be selected for all other browsing contexts.
u
переваривает utf-8, которого обычного достаточно
у
certbot certonly
помимо--nginx
есть ещё как минимум--standalone
, если вэб-сервера нет совсем, и--webroot
если хоть какой-то есть