He is an excellent speaker and it is very funny in parts and also quite heartwarming.
( See update below)
Here are the rest of the videos as mentioned above.If you click on this link it will take you to the separate videos for this talk and you can watch them in sequence. It seems easier to to do it this way rather than try and put all the videos on my blog. I have not viewed all of them myself yet and I think that there are also other speakers apart from Fr.Alison in the seminar which I have not heard yet, so I can't vouch for the content or quality on these.