VIDEOS:
BT21 (Ep. 4) - Cooky's Intro
Cooky is introduced in the series with a shift into a 80s/90s sports anime style, which is announced by a switch at 00:03 from HD 16:9 quality to VHS 4:3
Example of:
Deliberate VHS Quality
BT21 (Ep. 4) - Cooky's Intro
Example of:
Aspect Ratio Switch