Videos wont play, sound works

most videos, including videos on apples own site do not work on my new imac. I have reinstalled quicktime a couple of times and nothing has worked. ideas?

Which browser & version are you using? Have you tried other browsers?
Since you have a new mac, strongly suggest that you take advantage of your 90 days of FREE phone tech support and/or the Chat with a Support Agent. The online chat support is available 24 hours a day, 7 days a week.

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