I've downloaded but haven't yet viewed instruction videos on painting with acrylics, from
http://www.craftsy.com, but I've watched several of their drawing and oil painting courses and, while I'm sure there's the odd experience that's "off," I've found tremendous bang for the buck out of these offerings. I very much encourage browsing around the site, or at least getting on their email list, as there are very frequent sales on select courses. Even at full price, most run $20-$40.
Fairly detailed introductions and syllabi are available for each course, before you commit to it. As I say, I haven't watched the acrylics courses in my library yet, so I don't know if the matter of open time is addressed.
I try to watch one 30-60 minute lesson each evening, as I wind down after other chores are done, and I not only wonder "how they do that" for the price, but I'm almost always much inspired to pick up pencil, charcoal or brush at the end of each.
The "Craftsy" name may seem a little off-putting, but understand that the site focuses on a very wide range of artistic and creative pursuits in addition to painting and drawing.