# YouTube Data API . watermarks

## Instance Methods

Uploads a watermark image to YouTube and sets it for a channel.

Deletes a watermark.

### Method Details

`set(channelId, body=None, media_body=None, onBehalfOfContentOwner=None)`

    Uploads a watermark image to YouTube and sets it for a channel.

    Args:
      channelId: string, The channelId parameter specifies a YouTube channel ID for which the watermark is being provided. (required)
      body: object, The request body.
        The object takes the form of:

    {
        "targetChannelId": "A String",
        "position": { # Describes the spatial position of a visual widget inside a video. It is a union of various position types, out of which only will be set one.
          "cornerPosition": "A String", # Describes in which corner of the video the visual widget will appear.
          "type": "A String", # Defines the position type.
        },
        "imageUrl": "A String",
        "timing": { # Describes a temporal position of a visual widget inside a video.
          "offsetMs": "A String", # Defines the time at which the promotion will appear. Depending on the value of type the value of the offsetMs field will represent a time offset from the start or from the end of the video, expressed in milliseconds.
          "type": "A String", # Describes a timing type. If the value is offsetFromStart, then the offsetMs field represents an offset from the start of the video. If the value is offsetFromEnd, then the offsetMs field represents an offset from the end of the video.
          "durationMs": "A String", # Defines the duration in milliseconds for which the promotion should be displayed. If missing, the client should use the default.
        },
        "imageBytes": "A String",
      }

      media_body: string, The filename of the media request body, or an instance of a MediaUpload object.
      onBehalfOfContentOwner: string, The onBehalfOfContentOwner parameter indicates that the authenticated user is acting on behalf of the content owner specified in the parameter value. This parameter is intended for YouTube content partners that own and manage many different YouTube channels. It allows content owners to authenticate once and get access to all their video and channel data, without having to provide authentication credentials for each individual channel. The actual CMS account that the user authenticates with needs to be linked to the specified YouTube content owner.

`unset(channelId, onBehalfOfContentOwner=None)`

    Deletes a watermark.

    Args:
      channelId: string, The channelId parameter specifies a YouTube channel ID for which the watermark is being unset. (required)
      onBehalfOfContentOwner: string, The onBehalfOfContentOwner parameter indicates that the authenticated user is acting on behalf of the content owner specified in the parameter value. This parameter is intended for YouTube content partners that own and manage many different YouTube channels. It allows content owners to authenticate once and get access to all their video and channel data, without having to provide authentication credentials for each individual channel. The actual CMS account that the user authenticates with needs to be linked to the specified YouTube content owner.