Raymond usually watches the TWiT network on his Mac. He tried watching it on Windows 10 with Edge and it buffers a lot. It works fine in Chrome, though. Leo says that Edge is likely the issue then, and it's because Edge isn't really ready to be used. It may also be that the quality of the stream is too high for his PC to keep up. On YouTube, he can step up the quality manually.
Flash could be the issue with Edge. Chrome comes with its own version of Flash, so he should stick with Chrome. Updating Flash will probably fix it as well. But Flash is going away, so the easiest way is to use Chrome.