This video contains the 4 major 'different' endings. There are more, but the differences are not noticeable. I spent roughly 50 hours playing through the game to get the ending. I tried to not skip any chat dialogs so you can get the 'full' experience. I also included the ending credits just for the sake of it. It's also useful if you wanted to find out quickly so this is a one-stop video.
I'm not one who hated the Mass Effect 3 endings, and with the "Perfect Ending" they leave a cliff hanger that could lead to a fourth game. Reading through http://tinyurl.com/72eojwg is also helpful to understanding the endings, if you don't mind a bit of vulgarity. There is also support from http://i.imgur.com/yyF8K.png here, which explains the endings very well. Also a nice video too, http://youtu.be/Tbghjn7_Byc .
I hope you enjoy the video and post a comment & subscribe if you want more videos like this about other games! I try to keep all my videos clean and no interruptions what-so-ever.
Contents: 0:00 - The final charge 5:23 - Arrival on the citadel 18:20 - The Catalyst 24:01 - Destroy - All (Different character to achieve that ending) [Also known as vaporize] 27:42 - Control 33:26 - Synthesis 38:54 - Destroy ("Perfect Ending") 44:27 - "Perfect Ending" 44:50 - Stargazer 46:02 - Ending Credits
I put a lot of time into getting these endings and recording, please comment, like, subscribe.
Just some additional info, the filesize of this video rendered in 1080p is 4.01GB. The source video was roughly 130GB.
All credit is given in the video at the very end, this includes all credits for every single person who worked on Mass Effect 3.