Since you're already using params["setname"] as a key, you could save space and decrease storage depth by not including it again in the sub-hash. (In other words: if I want to store `name: "Rihanna", vids: ["a", "b", "c"]`, you could do it as `session["sets"]["Rihanna"] = ["a", "b", "c"]` rather than `session["sets"]["Rihanna"] = {name: "Rihanna", vidnums: ["a", "b", "c"]}`.