YouTube is said to be experimenting with new swipe-based gesture navigation and this would make the navigating between videos in the YouTube app a whole lot easier. You can slide with your finger to swipe between videos.
YouTube is testing this feature with its native app that we are familiar with and just adds swiping. Dragging to the left or right pulls you from video to video within the queue. However, this isn’t widely rolling out yet and might take sometime before it rolls out to everyone. However, both Google and YouTube might decide to cancel this feature altogether even before the official rollout begins, since these kinds of tests are pretty common.
At this moment, details about this feature are pretty slim, we should know more details when YouTube makes an announcement of the same.