What I learned from the tutorials...

(I watched them from the third video to the first... so that kinda messed me up)

From the first video, I really didn't learn THAT much, because it was so simple, but that was also the great thing about it, it explained everything I learned in much simpler terms. From the second video, I learned if you have the caps lock on, the smudge tool becomes a cross-hairs-like cursor. I learned if you hold down the control or command key then hit the plus sign or minus sign, it zooms in or out. The third thing I learned on this video is that the space bar is the shortcut to the hand tool. And from the third (and insanely long) video, I learned that the text tool, it's a vector tool. I never knew that. I also didn't know that almost all the buttons have shortcuts. That might be a handy thing to know. I also didn't know they had pre-made sort of symbols. Also something that I could have used, if I knew they were there.

Which one was most helpful? Probably the first video, it was simple, to the point, and showed how to do things that I actually would use.
Which one was most clear and easy-to-follow? First video, definitely.
Were they helpful in introducing you to Photoshop fundamentals? Yes, and no. I've already had a Photoshop class, so most of it was review, but it was a good sort of review.
Did you find any other tutorials on YouTube or elsewhere that were helpful? Nope. but I didn't look.