I had to reset my computer and have noticed that NVDA says blank when I press up down left and right arrows, when on youtube plus focus and brows modes aren't mentioned, I also tried a new download of NVDA, it worked for a while but it's going back to the same blank blank thing.
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It does work from time to time.
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It might just be youtube and hopefully it works in a couple days but I thought I'd warn you guys.