So this is a video I made about a year ago, and I'm just uploading now. Basically it's every Family Guy Intro variation. Also, note that at the time I made this video, Season 19 was not out, but it has the same intro that has been being used since 2014 (Season 13). Also, this video (and the rest of my channel for that matter) is not meant for people under the age of 13.
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Timestaps:
00:00 - Seasons 1 & 2 (1999 - 2000)
00:33 - Season 3 (2001 - 2003)
01:09 - Seasons 4 - 8 (2005 - 2009)
01:43 - Season 5 Episode 5 Variant (2006)
02:31 - Seasons 9 - 12 (2010 - 2014)
03:05 - Season 10 Episode 1 Variant (2011)
04:04 - Season 12 Episodes 7 & 8 Variant (2013)
04:39 - Season 12 Episode 20 Variant (2014)
05:40 - Season 13 - 19 (2014, still used today)
06:14 - Season 14 Episode 15 Variant (2016)