Hi Keith,
Thanks for reaching out!
The picture-in-picture button allows a learner to "pop out" a video and continue watching it while they scroll down in the course. To return to normal viewing mode, click the Picture-in-Picture button again or click the X on the floating video.
What browser are you using to view the course? This setting may need to be adjusted by the individual user. Jurgen shared some further insight here that you may find useful.
If you have additional questions please let me know. I hope this helps!
