Watermark Padding
mark-pad
Sets the padding between the watermark and the nearest edge of the video frame.
mark-pad accepts an integer between 0 and 1024, representing pixels of inset from the edge. This parameter works in conjunction with mark-align — the padding is applied from whichever edges the watermark is aligned to.
For example, with mark-align=bottom,right and mark-pad=20, the watermark is positioned 20 pixels from the bottom edge and 20 pixels from the right edge.
https://assets.imgix.net/video.mp4?fm=mp4&mark=https%3A%2F%2Fassets.imgix.net%2Fwatermark.png&mark-align=bottom,right&mark-pad=20