You can't really prove if someone has "soul" or not, that's the beauty of music. I think Yngwie is one of the most soulful players to ever pick up the instrument, but I accept that others find his playing wanky even though I don't understand why they think so. What moves you may not move someone else. I hear so many blues players that I think lack soul. Yeah, they play the same licks and turnarounds that Freddie King played 50 years ago, so where's the imagination, where's the individuality, where's the soul? But that's just my thoughts, I'm not telling you to feel the same.
Btw, I laughed quite a bit at that first video.