Saejin Oh's Speedpaints
I love this guy, shows his complete process including roughing out a sketch in various poses.
He made a bunch of videos but titled them "timelapse" instead of "speedpaint" so they don't show up in Youtube searches. He'd probably make more if they got popular. (Also his audio is usually a less than stellar Youtube Audioswap track)
I love how he goes from a messy, unimpressive sketch to a really clear, polished looking painting.
He seems to paint with confidence, like he knows exactly what he's doing!
Thanks for sharing, it gave me some motivation.