Video tutorials are unavailable on the website

On the website, all the videos from youtube on "Videos" tab seems unavailable. I'm not sure this is related with my location or not (Turkey).

https://netflix.github.io/falcor/video-tutorials/introduction-to-the-model.html https://netflix.github.io/falcor/video-tutorials/retrieving-multiple-values.html https://netflix.github.io/falcor/video-tutorials/intro-to-json-graph.html https://netflix.github.io/falcor/video-tutorials/building-paths-programmatically.html https://netflix.github.io/falcor/video-tutorials/json-graph-in-depth.html https://netflix.github.io/falcor/video-tutorials/retrieving-data-from-the%20server.html https://netflix.github.io/falcor/video-tutorials/path-optimization.html https://netflix.github.io/falcor/video-tutorials/batching-requests.html