PiP Base URL
video-mark-base
Sets a base URL for resolving relative paths specified in video-mark.
When video-mark-base is set, the value of video-mark is treated as a path relative to this base URL. Use video-mark-base[N] for a specific overlay layer.
video-mark-base=https://assets.imgix.net/overlays/&video-mark=reaction.mp4This resolves to https://assets.imgix.net/overlays/reaction.mp4 as the overlay source.