And, once again, I can't watch this video cuz it takes like forever to download...
... so I'll offer up this painting tip that I think people will benefit from:
To keep your paint brushes from becoming a mess, like this one:
...rinse the brush out in thinner BEFORE you start to paint.
What happens is that latex or oil based paint will work it's way up into the "heel" of the brush. (The "heel" of the brush is where the bristles are tightly bound together just before the metal ferrule.) Paint that gets up into that area of the brush will dry out there while you're painting, and that will ruin the brush. Once paint dries high up in the brush bristles like that, it'll prevent the bristles from laying straight as they did when the brush was new, and the bristles will start to stick out all over the place like in the photo.
By rinsing the brush out with either water or mineral spirits (depending on what kind of paint you're using) BEFORE you start to paint, any paint that does get up into the heel of the brush won't dry out. The thinner that's already there will prevent that paint from drying. Not only will that make it faster and easier to wash your paint brush out after painting, but it'll keep your paint brushes in much better condition cuz the bristles will continue to lay straight (unlike the photo above). (More paint brushes are ruined by paint dried up in the heel of the brush than any other cause.)
Also keep in mind that the thinner in the heel of the brush will be evaporating while you're painting, so it's a good idea to keep an eye dropper and some water or mineral spirits handy to replenish that thinner periodically. Capillary pressure will draw the thinner into the bristles and hold it there.