Windowed Fullscreen for Videos

Works with most websites that include videos through the HTML5 <video> tag, including videos that are embedded through iFrames and videos on websites that use shadow roots. Options: Enable / disable the extension for specific websites, and adjust button positioning so it doesn't interfere with other video overlays. You may report websites that are not compatible with this extension, but this usually happens due to websites being coded in exceptionally weird ways, so it might not always be possible for me to fix the problem. Please blame the website and not the extension :-)