Does listening to a lecture by a rabbi on YouTube count as Torah study?

Greetings, 

Listening to words of Torah in any way is considered Torah study. 

Sources: According to the opinion of the Gaon of Vilna zt"l (Biur HaGra, Orach Chaim 47:4), one fulfills the mitzvah of Torah study even through thought alone. See there. Certainly, one also fulfills the mitzvah through listening. And according to the opinion of the Alter Rebbe zt"l in the Shulchan Aruch HaRav (Laws of Torah Study, chapter 2, halacha 12), one must be careful to pronounce with his lips and let his ears hear everything he studies, whether from Scripture, Mishnah, or Talmud, unless he is engaged in analysis in order to understand one matter from another. And anything he studies only in thought, when it is possible for him to pronounce it with his lips and he does not do so, he does not thereby fulfill his obligation of Ve-limadetem otam, as it is written, This Book of the Torah shall not depart from your mouth, and you shall meditate on it, etc. And this is like all mitzvot dependent on speech, in which one does not fulfill his obligation through thought alone, unless he hears it from the mouth of the speaker, in which case the listener is as one who responds with his own mouth. See there. However, it would seem that here it is not applicable to say listener as one who responds, since this is recorded, and even in a live broadcast it is not the actual voice of the rabbi delivering the lecture. In any case, such a situation of listening to a lesson falls under unable to pronounce it with his lips, and in this he too agrees that one fulfills the mitzvah of Torah study, as above. See further what is brought on this in the book Pesakim u-Teshuvot (siman 246, letter 57 and note 639). 

With great success, Hillel Meirs