A far more in-depth video for you on CRISPR then the previous one (over an hour long); I think it's pretty cool that living things can "comment out" genetic code (e.g. that of viruses) just like a computer programming language, so that it is not executed:
https://www.youtube.com/watch?v=sp9eCYHcP5I
https://www.youtube.com/watch?v=sp9eCYHcP5I