I use Crash Course Anatomy videos quite often in my Anat and Phys class. This is my write-a-long, or WAL, for their video on the digestive system.
My WAL is broken into the sections shown within the videos and are mainly fill-in-the-blank with a couple longer write-out-the-answer questions. I always advise students to double the length of the video to estimate how much time it will get done, due to pausing/playing/thinking- this video is about 11 minutes long, so it will probably take the average student 20 minutes or so to complete.
Please note that there is no key included with this product. It's good for you to watch the video so you know what your students will see, anyway :)