I like the before and after screenshots, but there's not really enough "how-to" to really call this a tutorial. Basically all you're providing is the information that premiere has a 3-way color correction tool built in, and then showing a number of before and after shots of the images.
There's nothing wrong with that, but if it's to be a tutorial I think you need to provide more information about what changing each setting does to the image.
Obviously your main point is that you can accomplish most of what can be done with higher end color grading tools (specifically Colorista and Magic Bullet) without using those tools, and that's a good point to make for people who are unaware.
Premiere, Vegas, and Final Cut all have similar 3-way color correction tools available.. using those you can achieve much of the same results as if you were using a higher end color correction tool.
Here's more of what I would consider a tutorial... While focused around Magic Bullet and Colorista, the
Red Giant TV Episode #22 covers the techniques involved, and those techniques can be applied to the tools built into your NLE.