10.3 gene pools and speciation from Bob Smullen
Speciation: an illustrated introduction in 8 minutes or how about the Speciation Song – a song and an animation to introduce Speciation?
IB 10.3 – Gene Pools and Speciation, a 14m 40s video lesson from Dan Rott videos.
Crash Course Biology #15 – Speciation: Of Ligers & Men, in which Hank explains speciation in terms of finches, ligers, mules and dogs.
Paul Andersen (from Bozeman High) explains Reproductive Isolation and Speciation, then details the processes of Speciation & Extinction and finally describes Genetic Drift (this is more detail than is required for IB).
Here’s a presentation that explains the origin of species (speciation) very clearly: