Information about the watermarks that you want Elastic Transcoder to add to the video
during transcoding. You can specify up to four watermarks for each output.
Settings for each watermark must be defined in the preset that you specify
in 
CopyC#Preset
Watermarks are added to the output video in the sequence in which you list them in the job output—the first watermark in the list is added to the output video first, the second watermark in the list is added next, and so on. As a result, if the settings in a preset cause Elastic Transcoder to place all watermarks in the same location, the second watermark that you add will cover the first one, the third one will cover the second, and the fourth one will cover the third.
Declaration Syntax| C# |
public List<JobWatermark> Watermarks { get; set; }