(There's no video for iTunes 9.1.1 & 9.2.1 yet. Please contribute to MR and add a video now!)
iTunes 9.1.1 is the last version to support Mac OS X 10.4 Tiger on G3's.
iTunes 9.2.1 is the last version to support Mac OS X 10.4 Tiger on G4's and G5's and possibly on the first Intel Macs as well.
See also: iTunes 10.6.3 (the last version to support Mac OS X 10.5.8 Leopard)
iTunes9-1-1.dmg (93.63 MiB / 98.18 MB)
iTunes v9.1.1 (last to support G3's) / DMG image
iTunes9-2-1.dmg (101.81 MiB / 106.75 MB)
iTunes v9.2.1 (last to support Tiger) / DMG image
Mac OS X 10.4.10 Tiger or later
Emulating this? It should run fine under: QEMU