I really don't know why they even made this short, since it doesn't offer all that much. All of the characters are just goofing around, while waiting for the mutton soup to be ready. It feels more like something that was made specifically to be played during the end credits of a movie (if the end credits lasted around 28 minutes) and even though i did somehow enjoyed the experience (i saw it two times before writing the review) - i seriously doubt that everyone else will enjoy it the same way like me.
The best things about this short is the animation, sound, acting (it's still nice that the actors agreed to be in this short) and the fantastic music (which is the biggest reason of why i would recommend it to everyone, but there were still some occasions of repeating the same track), but the rest of the aspects like the story, characters (all of them are already established from the previous movies, but they could have at least added something new about them, since it's that long, but they didn't), dialogue (which was very minimal) and cinematography - all of those negatives makes it average at best.
If you decide to skip it (which is something that is fully understandable, if you do that), then i wouldn't blame you for that and for me - i do prefer "How to Train Your Dragon: Homecoming" more than this short movie, since it's way better and more rewatchable. With all of the positives and negatives, i'm giving "How to Train Your Dragon: Snoggletog Log" a 5.3/10.