Full screen mode
If a Youtube video is in HD, you should switch to full screen by clicking the full screen icon [ ] in the bottom right corner of the video player. To exit out of full screen, press Esc on your keyboard or click the Full screen icon again.
Turn off autoplay
If you don't want YouTube to Autoplay the next video, you can turn it off in your browser.
When you are playing a video, look in the upper right corner of your screen for the Autoplay toggle. Slide it to the left to turn Autoplay off.
If a Youtube video is in HD, you should switch to full screen by clicking the full screen icon [ ] in the bottom right corner of the video player. To exit out of full screen, press Esc on your keyboard or click the Full screen icon again.
Turn off autoplay
If you don't want YouTube to Autoplay the next video, you can turn it off in your browser.
When you are playing a video, look in the upper right corner of your screen for the Autoplay toggle. Slide it to the left to turn Autoplay off.