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i would assume anybody how searches the exact keyword of "how to tube" is not looking for fitness videos. if i wanted fitness videos i would search "fitness videos" .... the keyword "how to tube" seems to be how to tube feed/how to tube quilt. Not how to be fit. You need to target different keywords that are more relevant to your site. Forget about targeting your exact domain. If people want to go to how to tube's webpage, they'll find you at number 1 and go there. Otherwise they  need to know that you are the resource for fitness videos or whatever it may be... You're competing with YouTube. Good luck with that.