Neon green plastic. Probably for some important safety color coding.

My guess is a bunch of reflective safety tape/decals that got blown to shit. Impossible to say without knowing what was in the place before the explosion.

XP orbs

It's such a highly processed video, it honestly might be nothing. Just signal noise digitally amplified over multiple successive image enlargement loops.

If not, it also could be some kind of hi-vis material. The explosion appears to have been far more concussive than combustive, so it doesn't seem to have burned stuff so much as it broke everything apart and flung it around.

4Loco Sour Apple

As far as I know it's common pratice to include chemical markers in explosives unique to the factory, so if the explosive get stolen/used in an unauthorized manner the investigators can trace back were they were trafugated.

Maybe they also include high visibility pieces of plastic as a visual markers. If so on them there would be printed some identifying information like lot number, manufacturing date and factory address.

Aliens, bro. This obviously involved aliens.

Interesting that several of the pieces appear to be glowing...

I'm not at all suggesting radioactivity, but some of those bits appear to be radiating light. It could be reflected as much as anything. It's hard to tell from video screenshot resolution.