Issue Description

When the program starts, four random videos begin playing simultaneously. I like four girls in my screen.
If I open My Collection and choose a new video to play, the program replaces only one specific show—always the same one—no matter how many times I select a new video.
As a result, only that one slot can be replaced, and the other three remain locked, meaning they can never be updated with new selections.

Expected Behavior

Each time I select a new video from My Collection:

The new video should replace the oldest currently playing video, or

The new video should replace the video that was played first, ensuring that all four slots are eventually refreshed.

Current Behavior

The replacement logic always targets the same video slot (for example, slot #4), so the same one keeps being replaced, while the other three stay fixed indefinitely.

Suggested Fix

Modify the replacement logic so that:

The program tracks which of the four videos has been playing the longest or was loaded first, and

When a new video is selected, it replaces that oldest or least recently added video, rather than always replacing the same slot.

Alternatively, implement a round-robin replacement system:

Each new selection replaces the next slot in order (e.g., 1 → 2 → 3 → 4 → back to 1), so all four can be replaced over time.