I particularly like the opening, which is an interesting way to frame it without being too obvious it's not OOO/Kamen Rider-exclusive at first.
(And for those of you wondering why I titled this post "Because It Is," it's because of a hilarious exchange in the comments on the video:
Incoherent Commenter: "PuToTyra??? Why Abaranger???" [To translate: "Where's the PuToTyra combo in that opening sequence? Why did you put Abaranger (the series from which Power Rangers Dino Thunder was derived) there?"]
Non-English Speaking Video Poster: "Motifs and Putotira Abaranger is Pteranodon, Triceratops, Tyrannosaurus because it is. ※This document uses the Google translation." ["The motifs of both PuToTyra and Abaranger are Pteranodon, Triceratops, and Tyrannosaurus. ※I don't speak English, so I'm using Google Translate, and there's this weird symbol here."]