The play button in the video player
Media controls show the direction of playback, like a tape moving forward. That isn't the reading direction, so play and fast-forward stay pointing right. Logos, clocks and checkmarks also stay the same.
The back arrow is the tempting wrong answer. In RTL, "back" means going to the right, toward where reading started, so the arrow must point right. The "next" chevron and the "Continue" arrow point forward in reading order, so they flip too.