Well... the first video, I truly do dig the song, great tune, really. On the spinning I can't comment so much, I'm not a contact staffer at all, so its just a bit boggling to me. I dig the location and the big hoop on the ground works really well, I think.
Ze second video, the angles are working well, not so sure on the effect, filters never did sit with me well, but thats a personal thing. Again nice song. ^_^
Heh, as soon as I heard the song I knew the burn off was going to be timed to that... depending on who your intended audience is the burnoffs might be too numerous, I know I've seen plenty of burnoffs, so much so that its just a bit "Yeah, righto, lets see what you do AFTER this!" Though I must admit one of them seems pretty big! The video effects in this one I actually do like, as it highlights the lovely fire effect, making it probably closer to the impact it has in real life.
Overall... nice flow, I dug the difference in the speeds etc in the last one to the first two... perhaps your music choice could involve something with a lull and a crescendo so you could alter your style within the piece.
Sorry if I seem overly critical, but I'm all for constructive feedback. Just to clarify, this is actually much better than my stuff in most ways, I'm still trying to get over the general feeling the camera gives me when its pointed at me. So yeah, keep it up, really quite impressive for your first few forays into the world of video making, keep it up.