Math.floor(Math.random() * 3) + 1

edit: b, e, g, h are different segments included. So all unique segments are in these videos:

blue-a-b1-c0000-d-e1-f-g1-h1-i 1f3dbdfd6a7c3d574b6b9eb8d07a3567.mp4

blue-a-b2-c0000-d-e2-f-g2-h2-i 241eb47071c89d8f18b0948763d6389a.mp4

blue-a-b3-c0000-d-e3-f-g3-h3-i 498ec3ba6719291e77b2a8870c744bdf.mp4

red-a-b1-c0000-d-e1-f-g1-h1-i ea2222b8b7a5c72396f76d65cf56890a.mp4

red-a-b2-c0000-d-e2-f-g2-h2-i bac726340f5486d9e02942c243e5b56b.mp4

red-a-b3-c0000-d-e3-f-g3-h3-i ce1aef26388b49562eab495b597e8fbc.mp4