EdPuzzle

EdPuzzle is pretty cool... Not sure why the word puzzle is used for a video edit/questioning thing!
https://edpuzzle.com/

Teachers.

• Create a teacher account.  
• Select a video from the typical sources. Crop the video as needed.
• Add questions and comments to the video.
• Assign due date. 
• Other options are available as well.

Students.

• Create student account with granitesd.org account
• Get the code from your teacher to join their classroom.
• Do the appropriate assignments.

Teachers. 
You will see;

• The students progress including scores from questions you asked.
• How many times they watched the video.
• See/answer any comments they made.