I think its only through their app,
BUT... I've yet to run the required tests to see whats connecting..
Will do test this weekend with my Shark
SOLVED!!! I'm not sure if you've made any progress on this, but looks like someone has found a way to download front, rear & all modes videos (via HTTP) and at least live stream the front camera without the BlackVue mobile or desktop app: https://gadgetblogist.wordpress.com/tag/hacking/
It's 2 years old, but surprisingly BlackVue stills uses the same files which means the videos and stream can still be accessed the same way (I downloaded the latest firmware and unzipped/untarred everything that looked like a binary file and discovered the same files as the author).
Now to just take the author's script and run it on a car computer (Raspberry Pi 3 or even Kangaroo Mini PC) and I'm all set.
Thanks everyone for the help.
P.S. - The live stream opens up the possibilities for some cool integration with OpenCV - rating prediction via facial expression detection, about to puke detection, eating/selfying/3rd basing in the backseat detection, about to tip detection... the possibilities are endless.