Good time, mistakes are glaring enough that this should be improved upon anyway.

The speedrun timer shows 3:45.870. Retimed by frame counting according to https://www.speedrun.com/jj1/thread/t7a5q gives:

Last fully-lit epsisode selection frame is A = 0:29.139. (The first fading-out frame starts at A' = 0:29.172 and the video is 30 fps, therefore A = A' - 1/30 second.) First fully-black frame after boss is B = 4:14.658. The difference B - A is 3:45.519.