pantsu wrote in icon_tutorial pathetic

Okay, I know this question has been asked and answered like 29847309846 times, but I can't for the life of me find it anywhere in the memories or otherwise.
I'm going to attempt to be as least annoying as possible, but can anybody redirect me to a tutorial (or just tell me) about capping images from a Youtube video? Is that even possible/legal? I know about ImageGrab and planned on using it but it appears to require the opening of a video that's been saved to my computer, and I can't do that with a Youtube video afaik.
I have PSP9/AS3, if it makes any difference.