Any faraway exterior shots of the Mystery Island in which the shot comes from the ocean view is Sentai footage.
Here's when it's the start of Sentai footage
 
This stock sequence  is when it goes back to Sentai.
New footage
Back to Sentai 
Back to new
Back to Sentai 
New
Back to Sentai 
Back to new footage
Back to Sentai 
This shot of Choobo on the cliff is back to Sentai
This ground/bottom shot of Choobo is also Sentai
New
Back to Sentai
Back to new
Back to Sentai 
Here's footage of the Thunder Rangers on Lothor's Ship's Viewing Screen That shot of the Thunders is new footage.
Here's new footage of both of their Staffs, the longer version ones
This shot of Crimson, Choobo and Navy is when it goes back to Sentai footage
New
Back to Sentai footage, close-up shot of Navy Glove
Here's back to new footage
  That was reshot from a Sentai shot since in the Sentai shot, Supertoxipod is grabbing Yellow's neck.
More new footage of Supertoxipod
Back to Sentai footage  
Here's new footage 
Back to Sentai footage
Back to new footage
Back to Sentai
Back to new footage
Back to Sentai footage, these shots of the Toxic Steam covering Crimson
   
Back to new footage
It goes back into the Sentai footage of the Toxic Steam covering Crimson.
Back to new
Back to Sentai
Back to new 
Back to Sentai  
Back to new footage
Back to Sentai  
Any footage of Navy Ranger while he's in the cave with the other unmorphed Wind Rangers is new footage.
Back to Sentai once again
 
Back to new footage