Best camera for a model rocket/how to put it on?

So I am building a 7ft rocket for fun and to launch (name is "Mirage" and the manufacturer is Aerotech for anyone wanting to look it up). I wan t to attach a small, lightweight camera to capture video of its ascent. I wan t it to be small and lightweight as not to tilt the rocket when launching (that d be bad). I was thinking of putting a GoPro on the side, but I didn t know if it was too heavy or not. I looked up some ideas and there was a keychain one, but I want something better then that. Any ideas?

Also, since I have no experience with cameras on rockets, I was wondering what the best way and best place on the rocket is to put it.

Thanks for any help.

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