Use this video in conjuction with a map to quickly collect all 33 Jerusalem Cross flags in Jerusalem, Middle District:
http://www.assassinscreed-maps.com/JerusalemMiddle.htm
The video starts at flag 12, overlooking a town crier just south of the district border. This video was shot in one continuous take. The flags were not collected in numerical order. Here is an abbreviated table of contents in case you are looking for a specific flag or Templar:
Flags 1-5, 1:40
Flags 6-7, 1:10
Flags 8-9, 4:05
Flags 10-12, 0:15
Flags 13-17, 4:50
Flag 18, 4:35
Flags 19-20, 3:35
Flags 21-24, 6:10
Flags 25-28, 7:25
Flags 29-31, 8:35
Flags 32-33, 3:05
Templar 1, 2:25
Templar 2, 5:00
Templar 3, 6:55