YouTube videos frequently not playing

i've been having problems playing youtube videos in safari recently. happens on website (the same video on facebook works) , on random videos.

happens black video box swirling center (see image)


continues doing while 'playing' 4 seconds , goes beginning , starting again. constant loop.

not doing in other browsers.

can me out this?

 

it happens sometimes. first make sure have got latest flash player. or facing problems youtube server have mentioned not other browsers.

 

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