Here is video #2 for Double Trills. They are so much fun to play and practice, and quite possibly the easiest of the contemporary techniques to start with! Keep in mind there are two different kinds. Link to book https://www.apakamusic.com/product/expanding-your-toolbox-a-guide-to-beginning-contemporary-techniques-for-oboe/

https://youtube.com/watch?v=u9hZ03O5Hlo%2520frameborder%3D0%2520allow%3Daccelerometer%3B%2520autoplay%3B%2520encrypted-media%3B%2520gyroscope%3B%2520picture-in-picture%2520allowfullscreen