The reason Seamus created this type of episode was because some of his fans complained that his videos weren't long enough, and they wanted more content. So Seamus decided, "Rather than uploaded a lot of videos, I will upload one long video." He has taken this idea into games such as GTA IV, Dragon's Dogma, Portal 2, Ghost Recon: Future Soldier, and a few others.
Seamus has an episode he does called the Half-Hour of Power, similar to the full hour but half an hour. He has done this in Diablo III, Kingdom of Amalur: Reckoning, and Mario hacks. However, some may last up to 45 minutes.