The first video is an illustrated explanation of the story by SparkNotes. It does a good job including lots of details without being too lengthy.
The second video is a video review on the book. I personally like reading and watching reviews from other people before I "delve" into the product itself, so I enjoyed this one. The girl talks fast and explains briefly the main idea of the story.
The third video is one of my personal favorites, a Crash Course episode hosted by John Green. Crash Course is great because it has a good host, explains the main idea and sub-ideas of a topic well, and has really nice graphics that draws in the audience. John Green usually cracks a few jokes here in there for his episodes which keeps the audiences' attention.