Muslims- Is it Haram to admire from a far?

so i watch videos of this lecturer and he is very attractive and i love looking at him but i dont get nasty thoughts i just think he is beautiful Masha'Allah. i just want to know if it is haram to look at him and think omgg he is so hot? he teaches me a lot and its not like im going to do anything with him. he is married and lives far far away.