Unfortunately not, it was supposed to be recorded, but some technical issues prevented this from happening :(

I wonder if it would be legally ok now that I've left that company to write a blog post about the content of that lecture. (taking into consideration that it's trivial to decompile the client code out of the game SWF file)

I haven't worked or saw that code base for more than 4 years, but I could probably just jump back right in it without problems.