Muslim should spread useful knowledge among people but we are not allowed to harm others or cause loss to them or violate their rights.
It depends on what you watch. If you watch a stream which does not contain Haraam, so it is permissible to watch it.
We must keep in mind that we should not encourage companies spreading sinful materials among people even if watch permissible material only. Encouraging and supporting such companies involved in spreading sinful material in general should be avoided.
as salam alaikum
in itself there is no problem. However if the serial includes haram implications like deviating messages, indecent scenes and forbidden languages or music, it would be haram.
With prayers for your success.