A steady red light means stop.
The provided video excerpt focuses on flashing yellow and steady green lights, but the foundational meaning of a steady red light in traffic signals is universally understood as a command to halt. A steady red light indicates that drivers must stop before the marked stop line or crosswalk. Drivers must remain stopped until the light changes, or they are otherwise permitted to proceed according to local traffic laws (e.g., making a right turn on red where permitted).
