PiP Chroma Key Threshold
video-mark-chromakey-threshold
Controls how broadly similar colors are included in the chroma key when removing a background from a picture-in-picture overlay.
video-mark-chromakey-threshold accepts a numeric value from 0.01 to 1. Higher values expand the range of colors removed around the target color specified in video-mark-chromakey. Lower values produce a tighter key that only removes colors very close to the target.
The default threshold is 0.15.
https://assets.imgix.net/Croatia.mp4?fm=mp4&video-mark=https%3A%2F%2Fassets.imgix.net%2Fdocs%2Fsubscribe-pixabay-pixvids-video.mp4&video-mark-chromakey=67DA06&video-mark-chromakey-threshold=0.5Use a higher threshold if the background has uneven lighting that creates variation in the background color. Use a lower threshold if the key is removing parts of the subject that share a similar color to the background.
Use video-mark-chromakey-threshold[N] to target a specific indexed overlay layer.