For two years, cosplay dominated my channel and has some of the highest viewed videos of all time on my channel.
Costumes and cosplay of Disney characters was my most popular things to make. I made sure that the videos were clear and easy to replicate if someone was to make the outfit themselves.
I would occasionally do series of a particular character or film with an outfit tying into other videos such as hair or a makeup look. The thumbnail for all the costumes followed the same format with the full outfit shown on the left and the character it was based on on the right.