Video: 
My Little Pony Friendship is Magic (mostly)
Audio:
0:00 to 0:06 Nearly the only original audio
0:06 to 0:43 Azumanga Daioh
0:45 to 0:51 Monty Python sound clip
0:54 to 0:59 Super Waha http://www.youtube.com/watch?v=abHC1vvx30s
1:01 to 1:33 Verix - Drop the Dodongo http://www.youtube.com/watch?v=5yjh2BnTTBs
1:35 to 1:38 WoW Male Orc sound clip
1:40 to 1:58 Sixteen Feet - Cantina Band http://www.youtube.com/watch?v=c0h_yACM_3g
2:01 to 2:09 WoW Female Troll sounds clips
2:11 to 2:17 Really? You don't know? Its Pong youngin' (also the intro to Eisenfunk's Pong song) http://www.youtube.com/watch?v=cNAdtkSjSps 
2:19 to 2:45 DJ Steve Porter - Henry Rollins feat. The Techno Viking http://www.youtube.com/watch?v=Jf13MmZIcLs
2:48 to 2: 53 Oblivious Films' The Grind audio clip http://www.youtube.com/watch?v=3od9aUtrcz4
2:55 to 3:38 DJ Ephixa - Super Omega Chung Mix http://www.youtube.com/user/DjEphixa Download link http://ephixa.com/album/the-beginning-old-school-mini-mix-free-album-donate
3:40 to 3:46 WoW Blood Elf Male sound clip
3:48 to 3:51 WoW Draenei Female sound clip which leads to...
3:52 to 4:00 WTFBOOM http://www.youtube.com/user/MrVideoCompiler#p/u/7/IwhBa2a3KWI 
As used best by VideoCompiler http://www.youtube.com/watch?v=3p_OuMW4bfE (dude's account got banned but the legend lives on)
4:03 to 4:36 DJ Ephixa - Windmill Song (see notes for 2:55 to 3:38 above)
4:39 to 4:44 WoW sound clip, specifically http://www.youtube.com/watch?v=9Pvq9D2q4UI
4:46 to 5:04 GenericCAW ft. Raocow - I Love this Song http://www.youtube.com/watch?v=f6fg4JTRRLo  Whats a Raocow? http://www.youtube.com/user/raocow
5:06 to 5:40 Benny Benassi - Put your Hands Up http://www.youtube.com/watch?v=OiTrKoeILLM  Clip inspiration from blackfirebird2000's My Little Showtek video http://www.youtube.com/watch?v=q0gK0CnxylY (whom got his inspiration from ZerilaFFXI's Dancie Pie! video http://www.youtube.com/watch?v=oOwM5TlhFfs
5:43 to 5:47 Sound clip from Wulfolme of mlponies.com's forums. Made upon request *brohoof* Yes, its the same guy who did this voice http://www.youtube.com/watch?v=DJ-FYQv9Uvc
Pictures:
Can be found mostly on your favorite pony image dumpsite (be careful now)
Notable ones include:
2:00  Artist: John Joseco http://johnjoseco.deviantart.com/art/Friendship-is-the-Force-202697915
2:16 to 2:18 Original still image by Westy543, animated by Bistromatic, both members of http://mlponies.com 
2:19 Artist: Awesomonster member of http://mlponies.com
5:05 Artist: Raocow http://raocow.deviantart.com/art/wallpaper-demo-156619966
5:49 to End Wulfolme's kicking rad avatar (self-edited)