diff --git a/clients/you_tube/README.md b/clients/you_tube/README.md
index e6c0b57c89..8d51d1d2ef 100644
--- a/clients/you_tube/README.md
+++ b/clients/you_tube/README.md
@@ -11,7 +11,7 @@ Install this package from [Hex](https://hex.pm) by adding
 
 ```elixir
 def deps do
-  [{:google_api_you_tube, "~> 0.38"}]
+  [{:google_api_you_tube, "~> 0.39"}]
 end
 ```
 
diff --git a/clients/you_tube/lib/google_api/you_tube/v3/api/tests.ex b/clients/you_tube/lib/google_api/you_tube/v3/api/tests.ex
index 4ba28ff761..343bef5516 100644
--- a/clients/you_tube/lib/google_api/you_tube/v3/api/tests.ex
+++ b/clients/you_tube/lib/google_api/you_tube/v3/api/tests.ex
@@ -44,6 +44,7 @@ defmodule GoogleApi.YouTube.V3.Api.Tests do
       *   `:quotaUser` (*type:* `String.t`) - Available to use for quota purposes for server-side applications. Can be any arbitrary string assigned to a user, but should not exceed 40 characters.
       *   `:uploadType` (*type:* `String.t`) - Legacy upload protocol for media (e.g. "media", "multipart").
       *   `:upload_protocol` (*type:* `String.t`) - Upload protocol for media (e.g. "raw", "multipart").
+      *   `:externalChannelId` (*type:* `String.t`) - 
       *   `:body` (*type:* `GoogleApi.YouTube.V3.Model.TestItem.t`) - 
   *   `opts` (*type:* `keyword()`) - Call options
 
@@ -70,6 +71,7 @@ defmodule GoogleApi.YouTube.V3.Api.Tests do
       :quotaUser => :query,
       :uploadType => :query,
       :upload_protocol => :query,
+      :externalChannelId => :query,
       :body => :body
     }
 
diff --git a/clients/you_tube/lib/google_api/you_tube/v3/metadata.ex b/clients/you_tube/lib/google_api/you_tube/v3/metadata.ex
index d42a547656..97713ca299 100644
--- a/clients/you_tube/lib/google_api/you_tube/v3/metadata.ex
+++ b/clients/you_tube/lib/google_api/you_tube/v3/metadata.ex
@@ -20,7 +20,7 @@ defmodule GoogleApi.YouTube.V3 do
   API client metadata for GoogleApi.YouTube.V3.
   """
 
-  @discovery_revision "20210828"
+  @discovery_revision "20210906"
 
   def discovery_revision(), do: @discovery_revision
 end
diff --git a/clients/you_tube/mix.exs b/clients/you_tube/mix.exs
index 68856d37b9..97ce1ab2ab 100644
--- a/clients/you_tube/mix.exs
+++ b/clients/you_tube/mix.exs
@@ -18,7 +18,7 @@
 defmodule GoogleApi.YouTube.Mixfile do
   use Mix.Project
 
-  @version "0.38.0"
+  @version "0.39.0"
 
   def project() do
     [
diff --git a/clients/you_tube/synth.metadata b/clients/you_tube/synth.metadata
index a020642bd9..53eb36da64 100644
--- a/clients/you_tube/synth.metadata
+++ b/clients/you_tube/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/elixir-google-api.git",
-        "sha": "2a384a6ca3cca1e6e3f76720d391e07f3fc60fd8"
+        "sha": "4a3fbc718adde34896021b3adcd41374c2671770"
       }
     }
   ]