My only objection? Anybody can post a video, and so you can't guarantee that the person really knows what they are talking about. The videos are usually so short and poorly made, there's not alot of info. So when it comes to finding correct information about sewing, quilting, or knitting, I tread carefully. I don't know if a technique or the advice given is the best way - or even a good way. It's just that person's version of what probably worked for them.
Thinking about all this made me think of something my daughter and I share a love for - Craftsy video classes. She gave me a video for Christmas (yes, they have a wish list you can create, and she saw mine, and it made a wonderful gift!) So, I rave about my latest quilting classes thru Craftsy, and she tells me about all the stuff she learned about her new serger, baby projects, and working with knits with her video classes. I've got at least 5 more classes waiting for me that I haven't started yet!
The classes are inexpensive for all the projects and info you get (usually about $19 - $40 for 10-15 chapters of videos on the subject). You get to watch them whenever you want, and keep them forever. If a class is too expensive, get on their email list, and they will soon be sending you discounts.
But best of all, the teachers are verified knowledgeable people in their subject. They teach sewing quilting, cake decorating, (and many other crafts). They have blogs, and are in general immersed in the subject you want to learn. They know what they are talking about - and the videos are professionaly produced. You can also ask questions and talk with others who are taking the same class, and post pictures of what you have made.
If you'd like to try one out (and this is how I discovered Craftsy) take one of their free mini courses to get a taste. Want to know about sewing machine feet or something else?
There are more places to learn how to sew than your local fabric store. Although that's the perfect place to get your supplies!