If you like working with extreme time crunch and deadlines, why don't you work both on the new video while still making short videos, maybe one every two weeks ?
that would delay the long video. also, if i were going to do another thing simultaneously to the long video, it would be start the song schedule. the song schedule is the new bleeding 1st prioriy (kind of like 'just start making videos i don't care what videos' was the bleeding first priority in early 2014) except i actually have to finish this long video first