Rolling out this week on the YouTube iOS app (for 6S phones & above)!
From your video player:
Swipe left for the next video
Swipe right for your previously watched video
If you prefer, you can still tap for video player controls. More details here → https://goo.gl/SaRqyK pic.twitter.com/Es2ExHl8m9
That's strange. What device is this happening on? Have you checked other devices to see if it's happening there too? Let us know so we can look into it further.