No sound when playing yahoo videos

Hello, I have an iPad Pro 10” and the works fine most of the time. I can listen to music. Watch videos on Facebook, YouTube and other apps but when I want to watch something like a news video on yahoo the video has no sound. I tried testing in Chrome, Safari and even FireFox and it is the same issue time and time again. I love my iPad but this issue is very annoying and I use my iPad for everything and really need to figure out why these news videos have no sound at all. Any help would be greatly appreciated