As much as I'm not 100% on board about having them in y semi, we have LYTEX/Drive Cams in our trucks w/ cams that face in/out of windshield. They are always on and record things instantly w/ sudden braking, stopping etc. Have heard it goes back 15-25 days or so. Not sure if they have anything exactly like what you want but may have to check w/ them to see. Otherwise, bgums suggestion on the GoPro maybe your only choice.
2017 F350 DRW XLT, CC, 4x4, 6.7
2018 Big Country 3560 SS
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