The ep starts immediately with new footage of the Rangers as shown here.

As soon as you see this shot of Horror Bull

it goes to Sentai footage.
This shot

is when it goes back to new footage.
Here's footage of Astronema with Quantrons.

When you see this close-up shot of Horror Bull's gem

it goes back to Sentai footage.
As soon as you see the Silver Cycle, it's new footage. Here's a shot of Silver Ranger riding his Silver Cycle in new footage.

Here's Quantrons, Astronema and Destructoid.

Everything involving Destructoid is new footage because he was a monster in "Beetleborgs" which you can see below.

Previous Suit

This Mole Monster suit comes from Beetleborgs.

Destructoid.

Here's new footage of Silver Ranger riding his Galaxy Glider.

All footage involving the first Horror Bull (the one with the white one with red dots) is Sentai footage.
Here's Ecliptor and Astronema.

Here's a shot of Zhane and Astronema. In this shot Astronema is in a Human Disguise but Zhane doesn't know this person is Astronema.

Here's another shot of Astronema in her human guise.

Here's footage of Ecliptor and the 2nd Horror Bull.

Here's Elgar and Ecliptor.

Here's a shot of Andros' Communicator.

Footage of the 2nd Horror Bull that's show on the Megaship View Screen is Sentai footage.
As soon as you see the morphed Rangers, it's Sentai footage.
These shots of the Rangers and Horror Bull as shown on the Astro Megaship View Screen that Alpha and Zhane are watching is new footage.

All of the footage shown during this specific View Screen is new footage as well as all following footage shown in the View Screen as long as Alpha and Zhane are watching it.
Here's new footage of Zhane's DigiMorpher.

As soon as Zhane morphs, the following footage with Ecliptor, Horror Bull 2 and the Rangers is Sentai.
Here's another new shot of Silver Ranger riding his Cycle.

This shot of Ecliptor is new.

When you see this shot of Ecliptor

it's back to Sentai footage.
When you see this shot of the Red, Yellow and Pink Rangers,

it's back to new footage.
As soon as you see this shot,

it's back to Sentai footage. This next shot of Ecliptor and Horror Bull 2 is Sentai footage as well.

Horror Bull growing is Sentai footage.
When you see this shot of the Silver Ranger,

it's when the new footage starts back up again.
Here's new footage of Giant Horror Bull 2.

The shot of the 5 Rangers calling for Astro Megazord power is new.
All following shots off the Silver Ranger riding his Silver Cycle is new footage.
There was a shot of the Astro Delta Megazord firing its Gatling Blaster or rather "Gyro Blasters" at Horror Bull 2 which was removed.

Following info comes from Mega 24.
Here's Horror Bull 1.