What must move to achieve the high writing speeds necessary for video recording?

To achieve the high writing speeds necessary for video recording, both the tape and the video heads must move effectively. The video heads are responsible for reading from and writing onto the tape, and their movement across the tape is crucial for capturing video data accurately at high speeds. Simultaneously, the tape must also move at a consistent speed to ensure that the data from the heads can be recorded seamlessly onto it. If either the tape or the video heads do not operate at the required speeds, it could lead to poor video quality, interruptions, or incomplete recordings. Thus, both components work in tandem to enable high-speed video recording, making the combination of their movements essential for optimal performance.