Here are some videos from Linux Con 2015 in North America
Linus Torvalds on the Linux Kernel, security and containers:
https://www.youtube.com/watch?v=5xKXHavHJ7U
Kernel Developer Panel:
https://www.youtube.com/watch?v=70WCBK0i-8U
Open-source OpenGL on the Raspberry Pi:
https://www.youtube.com/watch?v=EXDeketJNdk&list=PLpKFkwTqYbuxetEHbA3PDx3pAMxfeBxgF