Preview/Recap/Hook Segment "Not for sections that add additional content" Rule Potentially Violated

[computerstimulation]

We might have come across multiple Preview/Recap/Hook segments where the "Not for sections that add additional content" rule might have been violated.

Exhibit A:
535aeb2a650556e9b619565f69a095f1774ab27f9edc3788a8f345b75ac777fa7 in https://www.youtube.com/watch?v=-kuG6RgL32c

The useful introduction in this video by Marques Brownlee that adds context to the video is not repeated anywhere else in the video, or likely in any other video.