Great introductory talk on DateTime! I hadn't heard of a few of the libraries you mentioned but I will definitely keep an eye on them for future projects.
Great example to use to demonstrate TDD. Great talk!
This was a great overview of Jenkins and PHP. It is always great to hear personal experience with project before I try something out.
I learned a few things I did not know about the DateTime object. John is always relaxed which makes it easy to ask questions.
It has inspired me to try Kata and using the FizzBuzz example of test-driven development.
Great overview of Jenkins and how it has added value to your everyday business. It's a goal of mine to implement it on a few of my larger projects so hearing these success stories is a great motivator.