On one hand, as part of the mod squad, I would like the best for pixelation. So having the awareness of the existance of a video tutorial thread, if I were recording my process, I would post it there in hopes it would serve someone, rather than sell it.
But on the other hand, Pixelation doesn't own Alex nor his art, so we can't say what he can or can't do. (Then again, that doesn't mean I agree with his choice, but ah well)
At the end is all up to your mindset, I guess.