 EBU has performed tests that show that the bandwidth savings of interlaced video over progressive video is minimal, even with twice the frame rate.I.e., 1080p50 signal produces roughly the same bit rate as 1080i50 (aka 1080i/25) signal, and 1080p50 actually requires less bandwidth to be perceived as subjectively better than its 1080i/25 (1080i50) equivalent when encoding a "sports-type" scene.The VHS, and most other analogue video recording methods that use a rotary drum to record video on tape, benefit from interlacing.