Does なぜ's pitch ever change in embedded questions?


I have always heard なぜ{HL}, but [this one](https://youtu.be/ul9amfar8Jw?t=34)
sounds like なぜ{LH} in 英語ベースの英語学習がなぜ間違ってるかというと. Am I mishearing it? I think
most people say なぜ{HL} in both independent interrogative clauses and embedded
questions, so this one throws me for a loop.

