Android "app" (from chrome) stuck in portrait mode

Like the title says. I can watch w2g on my chrome browser on my tablet in landscape mode (but for some reason the screen moves/scrolls “down” whenever I type in chat). However, when I try watching it on the app you get when you install from chrome (which I use because it doesn’t have the scroll when typing issue), the screen is LOCKED into portrait and cannot/will not go to landscape no matter what I do.

Please help :sob: