Hey, now that I think of it, I have a little tip to share with you, especially vloggers who are just starting out, who don't have professional equipment but still wish to be heard in the YouTube community.
I've never uploaded a video with me talking in it on YouTube but I already did one, just for fun, and what I noticed is that when I record myself with my regular little camera, the sound of my voice is... disturbed by a constant crackling sound in the background. I don't know if some of you have this problem, but I've already seen videos on YouTube having this problem. Well, it's not all the time a problem since in some cases the voice is still clear, but it's still annoying, don't you think?
So what I did is to record myself with the camera... and with the voice recorder in my phone at the same time! What happens is that the recorded audio in my phone is much clearer than in my camera... I don't know how, but it's true that my camera is older than my phone...
Anyway, you can just give it a try.
After recording, just import both medias into your editing software and mute the audio of the movie you recorded from the camera and replace it with the audio from your phone! And you are done.
Lip syncing? Well just match the 'beats' (the lines thing, like for heartbeats, I just can't grasp the word) of both audio before muting the camera one, if you know what I mean.
Good luck!