"All I want is a little commitment, and you can't give me that?" Newton said in the NSFW video.
Newton's future with the Panthers has remained unclear since he was limited by a foot injury to just two games in 2019.
Ian Rapoport of NFL Network reported Tuesday the team was "moving forward" with Newton as the starter but also noted "a lot can still happen in the coming months."
New Panthers coach Matt Rhule gave the quarterback a vote of confidence Tuesday at the NFL combine.
"I absolutely want Cam here," Rhule said, per David Newton of ESPN. "There's no doubt about that."
That indicated the quarterback will remain on the roster in 2020 for the final season of his contract.
Still, there has been speculation about a trade involving Newton. While the 2015 MVP has been with the team since he was drafted No. 1 overall in 2011, shoulder and foot injuries have limited him over the past two seasons.
With Carolina likely headed toward a rebuild, the organization could try to shed his $21.1 million cap hit and move forward with Kyle Allen and Will Grier or find an external option.