When using the watermark API and putting in different values for the watermark scaleHeight, there is no difference in the sizing of the watermark on the resulting videos
// scaleHeight 50
overwolf.media.videos.addWatermark("overwolf://media/replays/Ekko/Osu!/Osu!_08-11-2021_13-54-50-372/Osu+08-11-2021+13-54-55-076.mp4", "wmark.png",{scaleHeight:50}, console.log)
produces the exact same output as does
// scaleHeight 500
overwolf.media.videos.addWatermark("overwolf://media/replays/Ekko/Osu!/Osu!_08-11-2021_13-54-50-372/Osu+08-11-2021+13-54-55-076.mp4", "wmark.png",{scaleHeight:500}, console.log)