Inserted Youtube video opens youtube.com

I am having problems only in some devices to share presentations wich includes Youtube videos inserted.
In those devices, when the video starts, user is redirected to Youtube site instead of staying in Prezi.
Could you please tell me why is this occuring?
Thank you,

Hi @Hospital_Virtual, could you please send me the link of the presentation in question?
Could you tell me what kind of devices has this behaviour?