Using YouTube as Source for Classical Music

I recently read an article on NPR about how valuable YouTube is for classical music. And, without hesitation, I 100% agree. When a person can watch a video of Maira Callas singing "Una voce poco fa" from Rossini's Il Barbiere di Siviglia in Paris, 1958, in their own home without going to a public library (which will most likely not have it), well, you can't get much better than that. If you haven't perused YouTube for classical music, I suggest you do so, you won't be disappointed. Here are a few of my favorite videos:

• Natalie Dessay performing "Les oiseaux dans la charmille" from Offenbach's Les Contes d'Hoffmann (Watch Video)
• Anna Netrebko performing "Regnava nel silenzio" from Donizetti's Lucia di Lammermoor (Watch Video}
• Jose Van Dam performing "Non piu andrai" from Mozart's Le Nozze di Figaro (Watch Video)