Update README to list code samples in directory

go/README

@@ -15,8 +15,7 @@ Example usage:
 
    go run search_key_keyword.go
 
-The Freebase API and YouTube Data APIs must be enabled for the project associated with this
-key.
+The YouTube Data API must be enabled for the project associated with this key.
 
 To run any sample that requires authorization on behalf of a user, such as checking
 for uploads, this requires the shared oauth.go file to be passed as a parameter to "go run".
@@ -34,3 +33,37 @@ oauth.go contains code that is shared between the code samples that require OAut
 authorization, so it must be passed as a parameter to "go run".
 
 More information about the YouTube APIs can be found at https://developer.google.com/youtube.
+
+Samples in this directory:
+
+### Authorize a request
+
+Description: This code sample performs OAuth 2.0 authorization by checking for the presence of a local file that
+contains authorization credentials. If the file is not present, the script opens a browser and waits for a response,
+then saves the returned credentials locally.
+
+### Upload a video
+
+Method: youtube.videos.insert
+Description: This code sample calls the API's <code>videos.insert</code> method to upload a video to the channel
+associated with the request.
+
+### Retrieve my uploads
+
+Method: youtube.playlistItems.list
+Description: This code sample calls the API's <code>playlistItems.list</code> method to retrieve a list of 
+videos uploaded to the channel associated with the request. The code also calls the <code>channels.list</code> 
+method with the <code>mine</code> parameter set to <code>true</code> to retrieve the playlist ID that identifies 
+the channel's uploaded videos.
+
+### Search by keyword
+
+Method: youtube.search.list
+Description: This code sample calls the API's <code>search.list</code> method to retrieve search results associated
+with a particular keyword.
+
+### Post a channel bulletin
+
+Method: youtube.activities.insert
+Description: This code sample calls the API's <code>activities.insert</code> method to post a bulletin to the
+channel associated with the request.