Update docs for 1.4.2 release
diff --git a/docs/dyn/youtube_v3.watermarks.html b/docs/dyn/youtube_v3.watermarks.html
index 5820bf8..76e313f 100644
--- a/docs/dyn/youtube_v3.watermarks.html
+++ b/docs/dyn/youtube_v3.watermarks.html
@@ -79,14 +79,14 @@
 <p class="firstline">Uploads a watermark image to YouTube and sets it for a channel.</p>
 <p class="toc_element">
   <code><a href="#unset">unset(channelId, onBehalfOfContentOwner=None)</a></code></p>
-<p class="firstline">Deletes a watermark.</p>
+<p class="firstline">Deletes a channel's watermark image.</p>
 <h3>Method Details</h3>
 <div class="method">
     <code class="details" id="set">set(channelId, body=None, media_body=None, onBehalfOfContentOwner=None)</code>
   <pre>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)
+  channelId: string, The channelId parameter specifies the YouTube channel ID for which the watermark is being provided. (required)
   body: object, The request body.
     The object takes the form of:
 
@@ -106,17 +106,21 @@
   }
 
   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.
+  onBehalfOfContentOwner: string, Note: This parameter is intended exclusively for YouTube content partners.
+
+The onBehalfOfContentOwner parameter indicates that the request's authorization credentials identify a YouTube CMS user who 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 CMS account that the user authenticates with must be linked to the specified YouTube content owner.
 </pre>
 </div>
 
 <div class="method">
     <code class="details" id="unset">unset(channelId, onBehalfOfContentOwner=None)</code>
-  <pre>Deletes a watermark.
+  <pre>Deletes a channel's watermark image.
 
 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.
+  channelId: string, The channelId parameter specifies the YouTube channel ID for which the watermark is being unset. (required)
+  onBehalfOfContentOwner: string, Note: This parameter is intended exclusively for YouTube content partners.
+
+The onBehalfOfContentOwner parameter indicates that the request's authorization credentials identify a YouTube CMS user who 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 CMS account that the user authenticates with must be linked to the specified YouTube content owner.
 </pre>
 </div>