It's possible that this is related to the "Unifying subscriptions on YouTube and YouTube Gaming" update, here's the details on that: https://goo.gl/zfgfC4 . Let us know if these are gaming channels, thanks!
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It's possible that this is related to the "Unifying subscriptions on YouTube and YouTube Gaming" update, here's the details on that: https://goo.gl/zfgfC4 . Let us know if these are gaming channels, thanks!