Or you can put the backing track & your recorded guitar audio into a DAW with video capability & mix the whole thing together using line in options or close miking on your guitar amp. Then you have the potential for much better audio. Record yourself playing along with the Go Pro while you are tracking & import the video into the DAW to line up the video & the finsihed audio!

Hope that helps!

What kind of DAW do you recommend?

Someone said I should get an interface from Focusrite or presonus. Can you record the backing track on them as well as your guitar?