This is actual the default legal position, it's covered under "Employee created works". It doesn't need to be in an employees contract but is usually added as good practice to make things water tight. So in the course of your employment if you create works then the company holds the copyright not the author. Images, code, video etc. where ever copyright applies. So something like a software coder creating a website in the course of their job role the IP would rest with the company automatically, as would an image taken by a tog. That is unless there is provision within the employment contract that says the IP / copyright is assigned to the original author usually with the proviso the company is granted a license to the works free of costs or restrictions.
I think he was referring to things produced that were not part of his normal work for his own personal use. There is a similar clause in my contract for software related to the business I'm in regardless of whether I'm producing it for the company or not..