The premise is similar to Gravity Falls, but the show presents itself like a brackish mix of GF and Fairly Oddparents. The supernatural element is elaborate but ultimately means nothing and somehow remains a secret in plain sight. Everyone keeps their head in the sand and rolls with the weirdness, no questions asked. Not even the main characters care, and they're the ones doing all the discovery.
Victor and Valentino are bare-bones generic. You have the gross, loud, stupid one (Victor) and the sensitive, neurotic, goody-two-shoes (Valentino) who is implied to be intelligent, but not in a meaningful way. They're siblings who don't act like siblings, and when they try to, it comes off awkward and forced.
Episodes have dropped hints of an overarching plot building up, but I doubt the show will make it through a full second season.