The Force Watch Video feature can be set so that a video must be watched or the user will not be able to advance any further in the module.
The feature is located in the Upload Video area in the page section below the text editor. The image below shows what the Force Watch to End feature looks like when turned on.
To turn the Force Watch feature on click on the square to the left of Force Watch. The blue highlight will indicate it is on. Each video that you want to set as mandatory must have the feature turned on at the page level where it has been selected.
Make sure to save the page once you have turned the Force Watch feature on.