I know a shit ton of them but have to find them. Heres a few:)

https://gfycat.com/AncientEthicalCornsnake
https://track9.mixtape.moe/xoedqm.mp4

OP

Experimental Execution

Aperture Science tests the efficiency of dismembering organic materials with a closing portal.


Angle A: https://my.mixtape.moe/fgnayg.webm
Angle B: https://my.mixtape.moe/gxlvli.webm
Angle C: https://my.mixtape.moe/zmkqmk.webm
Angle D: https://my.mixtape.moe/gadtfz.webm
Angle E: https://my.mixtape.moe/bzxude.webm

Sonya Split

Angle A:https://my.mixtape.moe/fbwfdi.webm
Angle B:https://my.mixtape.moe/mqgktt.webm
Angle C:https://my.mixtape.moe/cggvxf.webm
POV:https://my.mixtape.moe/qdqqaz.webm

Dungeon Crawl: The Paladin
--Scene--
Angle A:https://gfycat.com/RealPossibleFlycatcher
Angle B:https://gfycat.com/RashSoulfulDarwinsfox
Angle C:https://gfycat.com/MajesticUnitedCentipede


--Boulder Troll--
Angle A:https://gfycat.com/NaturalIdolizedHalicore
Angle B:https://gfycat.com/AnchoredBlackCaracal
Angle C:https://gfycat.com/MaleLimitedBalloonfish


--Demon--
Angle A:https://gfycat.com/ShamefulBossyHydra
Angle B:https://gfycat.com/WastefulBabyishBlackmamba
Angle C:https://gfycat.com/HardNeglectedHornet

My favorite person: Puzudz >:D

https://mega.nz/#!BVYHBSAa!muloQbpbWJoP2AEQBqVkcKreE3PaelpnREIZ_T9KiXM

Animated
https://www.gurochan.cx/g/res/478.html


I know you didnt ask for them, but pictures:
https://www.gurochan.cx/g/res/5429.html
https://www.gurochan.cx/g/res/19038.html
https://www.gurochan.cx/g/res/2693.html

On Gurobooru type in and search tags:
Split_in_half
guts
Intestines
Disembowlment

There is one last animation that has this girl who is split in half has her uterus removed by a monster. Forgot the artist...... Strong chance its in last link though.

Hope this helps:)