You get to see other characters and interactions and possibilities at Aoyama-sensei universe.
Some of this stories are related to Conan, some aren't. Some are Awesome, and some are just your average anime tale (but with his characteristic style).
My most favorite one was 'Play it again'. First because of the characters, and second because I'm an old soul myself, therefore, I miss the old days when samurai and knight values mattered, and no one thought those values were 'outdated', or 'toxic' or boring. That one story was worth the watch of the whole bunch.
The other ones vary from a 9 to a 6. But they are short, so you won't loose much by giving them a try.
