As someone have already mentioned, I'd also like to recommend Ctrl+Paint - [link] It's a -great- site with lots of tutorials, from basic drawing to fundamentals!
And if you're interested in concept art & design, I'd recommend the Design Cinema series from Feng Zhu - [link] He covers many insights of the entertainment industry, and he mostly goes through everything from sketch to finished painting, while talking about important things you should think about while painting and designing etc.
I know they've already been mentioned, but I can't stress them enough. They're both what have helped me a lot on my way so far!
The drawing program don't bite, so it is safe to try anything and everything, and then you will be just as good. Besides no matter what they do you will know what it was better after you learn more about the program.
I can see a lot of art drawn only using a hard brush, I can see when a soft brush was used, I can see when people use filters in Photoshop to imitate metal. I can see how a lot of things were done in just one image, because I did them myself at one time and I can see what I don't like about them, making them noticeable to me. I am not the only one that can see that. There are a lot of other artist that do to. So it is better to try everything you can think of, and use tutorials to try different thing in other ways. Then you will be really good, and maybe better than the people you watch in videos.
I'm actually going to do a series of Photoshop tutorials (broken into 30 minute chunks probably) on YouTube aimed at beginners where I introduce them to the program in real time and talk about common techniques, etc. It's not up yet. I only have a sort of program review / speedpaint thing up, but the rest shoul be up this week. My username is the same as here.
Feng is a master, he owns his own college for video game design. Even though he speeds it up, its still pretty lengthy, and he explains his process Its really valuable, since hes a teacher basically giving away college lessons on the subject away from free. A lot of the paintings are demos he did for his class.
They also explain things. That's the important thing for you. You need the painting process to learn, use whatever they are doing as elements you will obviously need in the future or use in other ways elsewhere. What exactly are you having problem with while painting?