[Feature Request]: CN does not respect the "Extract nth frame" setting

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

When doing hybrid video + CNs with "Extract nth frame" option set to 2, all images in all folders should match. They dont at the moment.

When doing hybrid video + CNs with "Extract nth frame" option set to 2, i have correctly extracted frames in "inputframes" folder - so the speed of the full initial video goes up to 200%.
But CNs with path to video in "Input Video/ Image Path" in their corresponding folders "controlnet_X_inputframes" have only first 50% of original video with "Extract nth frame" option set to 2.

So, in "inputframes" folder i have full init video at 200% speed, in CN folders i have only first 50% of init video with 100% speed. I have same amount of frames in all folders, but they do not match and my render is twisted.

### Proposed workflow

1. In a case of Hybrid Video AND any CN with init video - go to "Init - Video init" tab
2. Set "Extract nth frame" to 2, start render
3. Images in all folders should match

### Additional information

_No response_

### Are you going to help adding it?

-