It really does not feel anything like Spectro to me either, but that's not necessarily a bad thing in and of itself.
As for the "cell phone video" thing. It's 2025 and some people act like it's still 2005 or even 2015. I would almost literally kill to be able to watch Spectro, the original version of Imagination, Horizons, WoM, and MK's Mr. Toad (to name a few) recorded on an S25 Ultra.
I would agree that folks should be a little more hesitant to criticize how good certain aspects of the parade look until they've seen it for themselves (although even those should not be considered above criticism), but plenty of complaints raised in this thread have nothing to do with that.
I could tell that TBA was lacking in a number of key ways that go beyond how it looks in a video, but that didn't stop people from saying you shouldn't judge it until you've seen it in person. On the other hand, mere cell phone video was enough for me to figure out that Runaway Railway was going to instantly become one of my favorite rides, and it did. Crazy how that works. Of course it's best to experience these things for ourselves, but you can actually tell a lot from a well-made video.
I've also never seen Paint the Night live, but it's always been one of my favorite Disney parades. Consider me a double sinner both for comparing Starlight to PtN and for making quality judgments based on a video.
Besides, even if the only issue with Starlight was that it comes across poorly on a YouTube livestream, that's still a pretty serious failing on its own in the current year.