This is a playlist containing new WRs for each of the 4 episodes for Ultimate Doom. Also an older video for Final Doom: Plutonia, but the Ultimate Doom ones are the new ones so I'll keep this post about those.
UV-Max: Ultra-violence difficulty, while collecting ALL secrets (with the exception of those that are unreachable due to bugs), and killing ALL monsters (lost souls don't count).
Episode 1 in 17:49, 51 second improvement over the previous record.
Episode 2 in 23:30, 32 seconds faster than the previous record.
Episode 3 in 16:48, 33 seconds faster than the previous record.
Episode 4 in 17:50, 4 minutes and 4 seconds faster than the previous record.
Read the video descriptions for more info! Zero Master always makes really good descriptions for his videos, with breakdowns of each level.