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kannan asked:

Many channels like BBC and universal music provides short video clips to youtube under an agreement. Also you tube gives code to embedd its video on any site.If a site is earning money with adsense ads,then is it legal to do such embedding? If not what can happen when such embedding is done?
If it is illegal then why does youtube provide such a facility and say in tos that it is allowed.?
What is the use of channels providing youtube with this facility their content?