YouTube is making it easier for you to subscribe to videos—at the same time, helping its users get more subscribers. Embedded videos now have a “Subscribe” button at the top left portion of the video. You just hover over the logo of the channel owner and the option to subscribe to the channel will show up (or it’ll show if you’re already subscribed to said channel). You can check it out in the sample video we’ve embedded above from our channel. Simply hover over the Canadian Reviewer logo to see it in action.
Source: Engadget