Boogiepop and Others Promotional Trailer references
Those scenes are highly possibly original materials created exclusively for the trailer.
A comment by 'foq fiq' on the Japanese version of the trailer mentioned

放送決定のイベントでプロデューサーが最後に
「あくまで『このくらい本気で作りますよ』ってことを伝えるために作ったティザー用の映像なので本編には出てきません」って言ってた
見覚えのない合成人間は原作にも登場しないPVオリジナル

At the end of the event for the broadcast decision, the producer said
&quot;After all, because some scenes created for the trailer were to convey that 'we are making it like this seriously', they do not appear on the main story&quot;.
The unrecognizable characters are trailer-original that do not exist on the source material.