Back in May of 2017, Google discontinued the annotations editor due to creators putting an unreasonable amount of annotations on their video uploads. These colored blocks caused viewing to become obstructed and, quite frankly, laborious – videos looked disorganised, and the pop-ups were distracting. To answer these needs in a less-obtrusive manner, Google introduced cards and end screens in 2016, both of which are still used today. Cards are more cleanly designed pop-ups that appear in the top corner at designated points in a video. Both of these work on the mobile platform as well, unlike annotations, and generate seven times more clicks across the platform.
Source: thestar November 29, 2018 02:26 UTC