19 is: Kick in the Door - Notorious BIG - couldn't remember the title earlier.
@MrFisk may be able to contribute to the rest - that's all I know.

In reply to this comment by eric3579:
Thanks, any more knowledge you can toss my way is much appreciate.

In reply to this comment by SlipperyPete:
Here's a few:

12. Real Hip Hop - Das EFX
13. Shimmy Shimmy Ya - Ol' Dirty Bastard
14. Method Man - Method Man
15. KRS - Step Into A World
16. Boogie Down Productions - South Bronx
17. Gang Starr - Full Clip
18. California Love - Tupac
19. TITLE - Notorious BIG
20. My Name Is - Eminem
21.
22.
23.
24. Mo' Murda - Bone Thugs 'n Harmony
25. Forgot About Dre - Eminem
26. Still DRE - Dr. Dre & Snoop Dogg

Thanks, any more knowledge you can toss my way is much appreciate.

In reply to this comment by SlipperyPete:
Here's a few:

12. Real Hip Hop - Das EFX
13. Shimmy Shimmy Ya - Ol' Dirty Bastard
14. Method Man - Method Man
15. KRS - Step Into A World
16. Boogie Down Productions - South Bronx
17. Gang Starr - Full Clip
18. California Love - Tupac
19. TITLE - Notorious BIG
20. My Name Is - Eminem
21.
22.
23.
24. Mo' Murda - Bone Thugs 'n Harmony
25. Forgot About Dre - Eminem
26. Still DRE - Dr. Dre & Snoop Dogg

Here's a few:

12. Real Hip Hop - Das EFX
13. Shimmy Shimmy Ya - Ol' Dirty Bastard
14. Method Man - Method Man
15. KRS - Step Into A World
16. Boogie Down Productions - South Bronx
17. Gang Starr - Full Clip
18. California Love - Tupac
19. Kick in the Door - Notorious BIG
20. My Name Is - Eminem
21.
22.
23.
24. Mo' Murda - Bone Thugs 'n Harmony
25. Forgot About Dre - Eminem
26. Still DRE - Dr. Dre & Snoop Dogg

I got this list from yt. No clue if it's correct. Your thoughts.

Sugar Hill Gang
Grandmaster Flash
Afrika Bambaata
Slick Rick & Doug E Fresh
Eric B & Rakim
Rob Base & DJ EZ Rock
Public Enemy t
Cypress Hill
Snoop Dogg, Dr. Dre
A Tribe Called Quest
Wu-Tang Clan
KRS One
Nas
Gang Starr
Old Dirty Bastard
The Notorious BIG
Tupac
Busta Rhymes
Eminem
M.O.P
Pharaoh Monch
Terror Squad
Bone Thugs n’Harmony
Eminem & Dr Dre
Dr Dre
Busta Rhymes
Rick Ross
Jay Z
Kanye West

Tags for this video have been changed from 'Notorious BIG Movie Christopher Biggie Wallace Sean Puffy Combs Mo Money Problem' to 'banned, redacted' - edited by kronosposeidon

^yes, the US cliches are clearly there..
it's almost like Notorious BIGs Hypnotize
http://www.videosift.com/video/Notorious-BIG-Hypnotize
but it's well made. I really like the track, there ought to be more disco-driven hiphop tracks..

Tags for this video have been changed from 'notorious, big, biggie, smalls, rap, music, 90 s, warning, ready to die' to 'notorious, big, biggie, smalls, rap, music, 90s, warning, ready to die, Puff Daddy' - edited by MrFisk