Here's an unnamed Planet
Here's a shot of 3 humans isnide the hallways of Terra V
Here's Brunt
 
Here's Radster with Stingwingers
Here's another new shot of Radster
Here's new footage of the Condor GalactaBeast
Here's new footage of the Lion
Here's new footage of the Wildcat
Here's new footage of the Gorilla GalactaBeast
Here's new footage of the Wolf
The sequence in which you see the scene show all of the GalactaBeasts being together is Sentai footage but it's reversed footage.
Here's new footage of the Rangers in the same shot as the Beasts
The up-close shot of the Lion roaring is definitely Sentai footage.
The shot of a building blow up is Sentai stock footage obviously.
Here's new footage
This shot is when it goes into Sentai footage.
These shots
 
are new footage. It was reshot due to the bottle Radster drinks from in Sentai footage.
This is when it returns to Sentai footage
Any shots of Radster with the green liquid bottle is new footage. After the 2nd shot of him with that bottle, it then switches into Sentai footage of him growing.
Here's Trakeena

Sentai footage which is mostly just Radster stuff comes from Gingaman Episode 2