Once you see the vines in Turtle Cove then that's new footage.
Here's new footage of Master Org in new but much more powerful form

Here's new footage with Master Org and the Lunar Wolf Ranger 
More new footage 
New fotage of Master Org with the Nexus Blade 
The beginning of Master Org growing is new footage but once it cuts to
this shot
then that is when it goes to Sentai footage.
It then cuts to this new footage shot of the Black Bison Ranger and the
Red Lion Power Ranger while they're still on the ground as they're
looking at Master Org 
These shots... of the Master Org... right now I'm calling them new
footage because of the buildings

Here's some definite new footage 
Here's new footage 
This shot
I do not believe comes from this counterpart
Sentai episode but I believe it comes from the last episode in which we
saw Animus fought. And yes, this would be Sentai footage of course.
This shot is a shot that goes back to new footage 
Back to Sentai footage of Animus, also known in the Bandai of America
toyline for Power Rangers Wild Force as the Animus Megazord 
Here's new footage of the Giant battle
I'm sure this is when it goes back to Sentai 
Back to new footage 
Yes, Sentai footage 
Back to new footage 
More new footage 
2 big differences here is that Tetomu wasn't interested in retreating
like Shayla is. The other big difference is that the zord battle takes
place in the city whereas the mecha/robot battle took place in the
mountains.
Another difference is GaoSilver wanted to battle because during the
Great Battle between Animus and their ultimate Org, he actually wasn't
able to combine his 3 Power Animals yet. The power of the cursed wolf
mask is what gave him the necessary power in order to combine his 3
animals to form a Giant mecha.
Anyway after Merrick calls for his zords to descend, it then quickly
cuts to a black-colored background in which you see the Predazord forms
from its sequence however they cut the forming the Predazord sequence
considerably by a lot.
Back to Sentai 
Back to new footage 
More new footage 
Once you see tthe double sequence of the Predazord and Animus powering
up their Finisher moves then that is when it goes back to Sentai
footage even though it's just typical Sentai stock stuff.
More new footage 
It will then cut to a Sentai shot of the Predazord cockpit.
Back to new footage of the Predazord 
New footage of the Predazord blowing up 
You will see tthe Lunar Wolf Ranger getting forcibly ejected from his
cockpit and then it lands while being forcibly demorphed. After that it
will cut to this Sentai shot of Animus 
More new footage 
Back to Sentai footage
However notice closely at the thing on the
right, that's not the Animarium, that's the turtle-shaped place that
exists solely in Gaoranger.
After the Animarium picks up Merrick and Kite through their beam, it
then cuts to an up-close Sentai shot of the Giant Master Org.
New footage of Master Org and the Animarium 
Back to Sentai footage 
Once you see the feet of Master Org on the Animarium then that is when
it goes back to Sentai footage once again.
These shots
are a case of MMPR Productions just copying
and pasting Cole and Taylor into the Sentai shot.
The shot of the Rangers calling for their zords while on the Animarium
is obviously new footage.
However once you see the zords then that is when it goes back to Sentai
footage.
The Rangers' command order of "Wildzords - COMBINE" was reshot

The shot of the Red Ranger calling for the Soul Bird is also new
footage.
This Crystal should be the Gorilla Crystal 
This Crystal is presumably the Crystal that Alyssa uses while she's in
the cockpit after Taylor gives it to her to either form Double Knuckle
or the Kongazord 
It cuts back to Sentai footage once you see the Red Lionzord atop its
mountain top on the Animarium.
The shots of the Tiger, Shark, Bison and Eagle Crystals shattering are
all Sentai footage.
This shot of Lion and Cole
is yet just another copy and paste job with
an American actor.
Once they notice that their Growl Phones have disappeared then it then
cuts back to Sentai footage of the Giant Master Org.
Back to new 
It then cuts back to Sentai footage of Master Org.
With this shot of the Putrids, it's definitely not from Gaoranger 50
however I can't be absolute certain whether it's Sentai footage or
original/American footage. 
Here's more shots of the Giant Master Org
however I can't be certain whether it's
Sentai or original.
This shot
is another one I'm unsure about because it's
not from Episode 50. Also this shot and most of the following shots are indeed Sentai footage which originate in Ep 51.