The Touhou M-1 Grand Prix is a series of DVDs released at the various Comiket conventions wherein the ladies of Gensokyo team up in comedy duos to perform skits ('manzai's... unsure how to even plural that one) in order to be labeled the funniest in Gensokyo, amongst other surprises. There are 4 editions total, summarily marked the 1st, 2nd, 3rd and 4th Touhou M-1 GPs. The 4th edition was recently released at C77.
You can find translation efforts ongoing over at Youtube. dgreater1 translated most of the 1st and 2nd GP but, for some reason, stopped. Furienify and his friends are taking over for the 3rd GP (a very makeshift job translating between Spanish, Chinese and spoken Japanese, but it works) and may try the 4th GP if they can get their hands on it.
Adding links to specific videos below:
1st 東方M-1ぐらんぷり:
Scarlet Mansion (Remilia/Flandre)
Yuyuko and Youmu
(Yuyuko/Youmu)
Kekkai Shoujo (Reimu/Yukari)
Witch Doll (Marisa/Alice)
Finals(?):
Witch Doll Finalist (Marisa/Alice)
Scarlet Tsukkomi Finalist(?) (Reimu/Flandre/Cirno)
2nd 東方M-1ぐらんぷり:
TeiReisen (Tewi/Reisen)
PatchuMirin (China/Patchouli)
Yakumo Chen (Chen/Ran)
Hourai Teruyo (Kaguya/Eirin/Mokou)
Finals(???):
Hourai Teruyo Finalist(?) (Kaguya/Eirin)
3rd 東方M-1ぐらんぷり
Judges: Yukari/Ran, Kanako, Suwako, Suika, Shikieiki/Komachi)
Hosts: Eirin, Rinnosuke
Prize: Becoming the Main Protagonists
Wind Girl (Aya/Momiji)
MikoMiko Spark (Reimu/Marisa)
TewiKourin (Tewi/Rinnosuke)
<<Eventually>> (Yuyuko/Youmu)
<<Eventually>> ("Marisa"/Alice)
Finals:
MikoMiko Spark Finals (Reimu/Marisa)
<- Victors
<<Eventually>> (Tewi/Rinnosuke)
4th 東方M-1ぐらんぷり
Judges: Ran, Remilia, Reimu, Parsee, Kaguya
Hosts: Sanae, Rinnosuke
Prize: ???
THESE ARE RAW UNSUBBED VERSIONS
Satorin Okyuun (Satori/Okuu)
WerePhoenix (Mokou/Keine)
Goddess Oni Girls (Suika/Yuugi)
Moriya Kero (Kanako/Suwako)
Finals (Very unsure):
Satorin Okyuun (Satori/Koishi)
??? (Okuu/Orin-sometimes-Satori, weird)