Software Developers always know they are supposed to be paying attention to security when they program. However, developers also know that without regular reminders both of the things they know and new threats, secure development practices can suffer.
As a result, you might find the new series of videos from the Red Hat Product Security Team useful. The first two videos cover that age old topic, “Input Validation” with the first video a bit of an intro and covering XSS, the second video covers two other common topics, SQL Injection and Command & Code Injection.
As always, the Developer playlist on Red Hat's YouTube channel is a useful source for development related videos.