I'm not seeing the black screen issue. Keep in mind recent video (like within under a minute) typically doesn't show up due to how it's recorded/loaded in chunks. So, I do see the black screen if I attempt to look back <60 seconds from current time. But anything older (that falls with the green timeline bar) is loading for me.
I'm also not seeing an issue with the settings page. Are you seeing it on all cameras in this network? And have you tried another browser to see if the same things happen?
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