[tet68]

Didn’t look like parachute flares, more like burning or
melting material.
Parachute flares are whiter/brighter and burn longer
and stay aloft for longer.

[Sirius Lee]

Didn’t look like parachute flares, more like burning or melting material

Chinese lanterns it sounds like.

[pfflier]

Parachute magnesium flares are used for battledield illumination and burn white for a long duration

IR decoy flares burn orange, are released in clusters and follow a ballistic trajectory behind an airplane.

By color and duration, they look like IR flares in the video. We see 'em all the time here at the Goldwater range. Planes blow out their unspent flares once a dispenser module is activated to prevent accidental release when they RTB. (The dispensers are one time use)