AZURE - Cognitive Services (Text to Speech - Neural Voices) Copyright

Hello everybody,

I have been calling and asking everywhere and Microsoft suppor finally sent me here.
My question is very clear and basic i think but no one has been able to answer me.

If i am trying the 1 month free trial of Azure - Cognitive services (Text to Speech) ¿ Can i use the neural voices for commercial use in Youtube? ¿or am i falling in copyright infringement?

Thanks.