you are referencing a tutorial from a textbook, Practical Textmining. I imagine that the SVB code is copyrighted material. It would be availible with the book. Here is a link to it on Amazon.
The hard copy edition comes with the materials such as scripts and data sets. The e-book version does not.
I did the you tube presentation referenced in the original question. I highly recommend the book, but the SVB code asked about is not included in the tutorial in the book. Importing XML was something I did in addition to the what was written about in Practical Text Mining.
What code do you need in addition to what was provided in the webinar?
I have posted some SVB code on my blog (DManswers.com) that might help you out.