readds seen/watched functionality to youtube subscriptions
当前为
This is an update to panni's 'Youtube subscription watched fix' that was on userscripts.org. This was only tested in Chrome, but I don't see why it wouldn't work in other browsers.
When you click/middle click on a video in your subscription page, it'll fade it out slightly so you can tell it's been watched. Feel free to post issues/fixes.
