The values "true" and "false" are not allowed on boolean attributes. To ...

[JayBizzle]

...represent a false value, the attribute has to be omitted altogether

[tomByrer]

I'm curious; does this cause issues, or is there a spec you can link to please?
Seems to work fine as-is in Win7, Fx31, Chrome, IE10.

[JayBizzle]

controls="false" doesn't work in Chrome on my machine (OS X), the controls are still visible

2.4.2 Boolean attributes

A number of attributes are boolean attributes. The presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value.

https://www.w3.org/html/wg/drafts/html/master/infrastructure.html#boolean-attributes

controls is a boolean value https://dev.w3.org/html5/spec-author-view/video.html#attr-media-controls.

Having controls="false" actually sets the value to true because of the presence of the attribute.

[tomByrer]

Thanks for the link & info Jay. Doesn't make sense to me, but there it is.

Looking at the spec, all of the following are the same:

<video autoplay loop muted controls="true" id="myVideo">
<video autoplay loop muted controls="yes-it-is-on" id="myVideo">
<video autoplay loop muted controls="false" id="myVideo">
<video autoplay loop muted controls id="myVideo">

[alvarotrigo]

Thanks @JayBizzle !