i was trying to edit a video removing movement in one element. I tried 7 different prompts to achieve this effect. Firefly retained or increased the movment every time. I was charged credits for each failure.

​@Alluring_bodyefab 
Not exactly sure what you want to achieve other than no movement. Are you wanting to pan around the room? zoom in towards the window?

There is slight movement which would be normal if you walk through streamers or move towards them. 

Zooming gave decent results. 
 

Make sure to delete the files that are not working to prevent having a bad seed.

How to Delete multiple Files

Delete multiple files

With some success 
Prompt used (Streamers)
FF Model 1 1080
​​​​​use the reference image, keep the details of the image, move through the streamers, the streamers remain stable and fixed

Prompt used (Streamers 1)
use the reference image, keep the details of the image, move through the streamers, the streamers remain stable and fixed, the camera lens zooms in on the window

Nate