This is shortly after launch while the satellites are still tumbling. Within a few days they align themselves so that their sunshields reduce their brightness and over the next few months they will raise them selves to their operational orbit.
For me, Edge is the only browser that behaves properly when a Youtube video is playing but is not in focus with hardware acceleration on (the exact scenario is I have a game on my main monitor with a Youtube video playing on my other monitor). Both Chrome and Firefox stop loading the video and show the spinning buffering symbol after a few minutes. All three browsers work fine with hardware acceleration off.
How do you know the copy-write holder has not claimed the revenue for that video? Taking the video down is only one of the options for copy-write holders.