There absolutely are two nominations for Dimension 20, one for "Dimension 20 (Web Series): Fantasy High" and one for "Dimension 20 (Web Series)".

In terms of the latter, these are the nominated characters:
Antiope Jones/Danielle Barkstock (D20)
Evan Kelmp & K Tanaka | Dream & Sam Black | Samantha Butler & Whitney Jammer (D20)
Evan Kelmp/Whitney Jammer (D20)
Fabian Aramais Seacaster/Riz Gukgak (D20)
K Tanaka | Dream/Sam Black | Samantha Butler (D20)
Katja Cleaver/Ostentatia Wallace (D20)
Kingston Brown/Pete Conlan | Pete the Plug (Dimension20)
Sam Nightingale/Zelda Donovan (D20)

Is there one (or two) campaigns the list of characters above can be linked to?