How to cope with YouTube and use it as an aid for effective teaching YouTube rules the roost. It is first resource that people refer to when they want to learn something new. After all, who would teach me how to replace a RAM on my laptop or to change the new windshield wiper blade on my old car?

YouTube is an extremely valuable resource. However, things do not work out that well if it is something more complicated like Linear Algebra or NMR spectroscopy.

Frequently, I meet students who have watched all the YouTube lectures even before the semester begins. They are also very judgmental about classroom lectures. I am soliciting help from the community about 


How to tell them that watching videos is no substitute for learning. Usually this needs to be conveyed at the start of the course, when they pay no attention to it. By the time they understand it, we are well into the depths of the course and it is too late.
Not watching videos is also not a wise thing to do. There are excellent makers who create excellent animations which I wouldn't be able to do ... actually never! How do I tell this to the students without appearing like abandoning my duties?
The biggest problem is enrolling students. Students (often the brighter ones) believe they have learnt the subject via YouTube well enough to skip the course altogether. How do I convince them that I will really help them study this subject beyond what they can manage via YT? How do I do this without sounding like a pimp? How do I politely tell them that they haven't learnt the subject via YT (or other online resources) at all beyond some mumbo-jumbo? Some of them might actually have learnt the subject to some extent ... How do I convince them of the utility of my course?


Thank you all.

EDIT: In light of objections by Anonymous Physicist, I must add that a succinct summary of my question is : "How to handle YouTube-aware students? 1) At the time of enrollment 2) at the begining of the course and 3) during the course?"
I've just embraced YouTube as part of my teaching. I've not used it to replace lectures or any classes but created my own separate YouTube content that serves a different purpose.

I am a copious consumer of YouTube, so I am perhaps familiar with some of the content there. I find that the viewers want to watch someone solve a problem or do something interesting or difficult but not be "taught" in the traditional sense.

I found that students need was to ask how to solve a problem when I was not around to show them how I might solve that problem. Although we had small group sessions when we could discuss problem solving, these were not really frequent enough for many students. Deferred gratification is a difficult thing for some students who prefer not to wait until the next support session.

To solve this dilemma I created some new unique problems that emulate the class work and create similar challenges without being useful for plagiarism. I then solved these problems as if I was a student and made the same set of blunders, many genuine on my part. I then verbalised how I would solve such an issue, create a working solution, and prepare it for classwork submission.

The idea was, that they could use these as a substitute for me being at their side and talking through a problem solution.

In the main, this has worked out. The episodes are not perfect, and could be improved; but it is path that teacher and class can walk together, and one has to start somewhere. Some students, foolishly just copied the work from the YouTube screen and handed it in as a class solution, when it was even a different problem; but they were the minority. Some students complained that  I did not solve their specific problem in the video, when there was clearly an analogue of a solution therein; but in the majority it was helpful. It was also a clear marketing ploy, in that some just picked the class "because it has YouTube" content!

What I did was additional and optional content. No student was required to use it, and all the information it contained was present elsewhere in written class material. It was just another form of delivery to complement existing media which helped some students.

Give it a try!