diff --git a/google/cloud/video/livestream/v1/outputs.proto b/google/cloud/video/livestream/v1/outputs.proto
index 55a98d67d2f8d..d54fa653fde8a 100644
--- a/google/cloud/video/livestream/v1/outputs.proto
+++ b/google/cloud/video/livestream/v1/outputs.proto
@@ -16,14 +16,17 @@ syntax = "proto3";
 
 package google.cloud.video.livestream.v1;
 
+import "google/api/annotations.proto";
 import "google/api/field_behavior.proto";
 import "google/protobuf/duration.proto";
-import "google/api/annotations.proto";
 
+option csharp_namespace = "Google.Cloud.Video.LiveStream.V1";
 option go_package = "google.golang.org/genproto/googleapis/cloud/video/livestream/v1;livestream";
 option java_multiple_files = true;
 option java_outer_classname = "OutputsProto";
 option java_package = "com.google.cloud.video.livestream.v1";
+option php_namespace = "Google\\Cloud\\Video\\LiveStream\\V1";
+option ruby_package = "Google::Cloud::Video::LiveStream::V1";
 
 // Encoding of an input element such as an audio, video, or text track.
 // Elementary streams must be packaged before mapping and sharing between
@@ -55,11 +58,15 @@ message MuxStream {
   // Supported container formats:
   //
   // - `fmp4` - the corresponding file extension is `.m4s`
-  // - `ts`
+  // - `ts` - the corresponding file extension is `.ts`
   string container = 3;
 
   // List of `ElementaryStream` [key][google.cloud.video.livestream.v1.ElementaryStream.key]s multiplexed in this
   // stream.
+  //
+  // - For `fmp4` container, must contain either one video or one audio stream.
+  // - For `ts` container, must contain exactly one audio stream and up to one
+  // video stream.
   repeated string elementary_streams = 4;
 
   // Segment settings for `fmp4` and `ts`.
@@ -90,6 +97,10 @@ message Manifest {
 
   // Required. List of `MuxStream` [key][google.cloud.video.livestream.v1.MuxStream.key]s that should appear in this
   // manifest.
+  //
+  // - For HLS, either `fmp4` or `ts` mux streams can be specified but not
+  // mixed.
+  // - For DASH, only `fmp4` mux streams can be specified.
   repeated string mux_streams = 3 [(google.api.field_behavior) = REQUIRED];
 
   // Maximum number of segments that this manifest holds. Once the manifest
@@ -203,7 +214,7 @@ message VideoStream {
     int32 height_pixels = 2;
 
     // Required. The target video frame rate in frames per second (FPS). Must be less
-    // than or equal to 120. Will default to the input frame rate if larger
+    // than or equal to 60. Will default to the input frame rate if larger
     // than the input frame rate. The API will generate an output FPS that is
     // divisible by the input FPS, and smaller or equal to the target FPS. See
     // [Calculating frame
@@ -211,8 +222,10 @@ message VideoStream {
     // more information.
     double frame_rate = 3 [(google.api.field_behavior) = REQUIRED];
 
-    // Required. The video bitrate in bits per second. Must be between 10,000 and
-    // 80,000,000.
+    // Required. The video bitrate in bits per second. Minimum value is 10,000.
+    //
+    // - For SD resolution (< 720p), must be <= 3,000,000 (3 Mbps).
+    // - For HD resolution (<= 1080p), must be <= 15,000,000 (15 Mbps).
     int32 bitrate_bps = 4 [(google.api.field_behavior) = REQUIRED];
 
     // Specifies whether an open Group of Pictures (GOP) structure should be
diff --git a/google/cloud/video/livestream/v1/resources.proto b/google/cloud/video/livestream/v1/resources.proto
index 10df59e79050b..40407465f807c 100644
--- a/google/cloud/video/livestream/v1/resources.proto
+++ b/google/cloud/video/livestream/v1/resources.proto
@@ -16,18 +16,21 @@ syntax = "proto3";
 
 package google.cloud.video.livestream.v1;
 
+import "google/api/annotations.proto";
 import "google/api/field_behavior.proto";
 import "google/api/resource.proto";
 import "google/cloud/video/livestream/v1/outputs.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 import "google/rpc/status.proto";
-import "google/api/annotations.proto";
 
+option csharp_namespace = "Google.Cloud.Video.LiveStream.V1";
 option go_package = "google.golang.org/genproto/googleapis/cloud/video/livestream/v1;livestream";
 option java_multiple_files = true;
 option java_outer_classname = "ResourcesProto";
 option java_package = "com.google.cloud.video.livestream.v1";
+option php_namespace = "Google\\Cloud\\Video\\LiveStream\\V1";
+option ruby_package = "Google::Cloud::Video::LiveStream::V1";
 
 // Input resource represents the endpoint from which the channel ingests
 // the input stream.
@@ -37,16 +40,6 @@ message Input {
     pattern: "projects/{project}/locations/{location}/inputs/{input}"
   };
 
-  // Security rules for access control. Each field represents one security rule.
-  // Only when the source of the input stream satisfies all the fields, this
-  // input stream can be accepted.
-  message SecurityRule {
-    // At least one ip range must match unless none specified. The IP range is
-    // defined by CIDR block: for example, `192.0.1.0/24` for a range and
-    // `192.0.1.0/32` for a single IP address.
-    repeated string ip_ranges = 1;
-  }
-
   // The type of the input.
   enum Type {
     // Input type is not specified.
@@ -64,16 +57,26 @@ message Input {
     // Tier is not specified.
     TIER_UNSPECIFIED = 0;
 
-    // Resolution less than 1280x720.
+    // Resolution < 1280x720. Bitrate <= 6 Mbps. FPS <= 60.
     SD = 1;
 
-    // Resolution from 1280x720 to 1920x1080.
+    // Resolution <= 1920x1080. Bitrate <= 25 Mbps. FPS <= 60.
     HD = 2;
 
-    // Resolution more than 1920x1080 to 4096x2160.
+    // Resolution <= 4096x2160. Not supported yet.
     UHD = 3;
   }
 
+  // Security rules for access control. Each field represents one security rule.
+  // Only when the source of the input stream satisfies all the fields, this
+  // input stream can be accepted.
+  message SecurityRule {
+    // At least one ip range must match unless none specified. The IP range is
+    // defined by CIDR block: for example, `192.0.1.0/24` for a range and
+    // `192.0.1.0/32` for a single IP address.
+    repeated string ip_ranges = 1;
+  }
+
   // The resource name of the input, in the form of:
   // `projects/{project}/locations/{location}/inputs/{inputId}`.
   string name = 1;
@@ -90,8 +93,10 @@ message Input {
   // Source type.
   Type type = 5;
 
-  // Tier defines the maximum input specification (for example, resolution)
-  // that will be accepted by the video pipeline. The default is `HD`.
+  // Tier defines the maximum input specification that is accepted by the
+  // video pipeline. The billing is charged based on the tier specified here.
+  // See [Pricing](https://cloud.google.com/livestream/pricing) for more detail.
+  // The default is `HD`.
   Tier tier = 14;
 
   // Output only. URI to push the input stream to.
@@ -206,6 +211,46 @@ message Channel {
   // always present when [streaming_state][google.cloud.video.livestream.v1.Channel.streaming_state] is
   // [STREAMING_ERROR][google.cloud.video.livestream.v1.Channel.StreamingState.STREAMING_ERROR].
   google.rpc.Status streaming_error = 18 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Configuration of platform logs for this channel.
+  LogConfig log_config = 19;
+}
+
+// Configuration of platform logs.
+// See [Using and managing platform
+// logs](https://cloud.google.com/logging/docs/api/platform-logs#managing-logs)
+// for more information about how to view platform logs through Cloud Logging.
+message LogConfig {
+  // The severity level of platform logging for this channel. Logs with a
+  // severity level higher than or equal to the chosen severity level will be
+  // logged and can be viewed through Cloud Logging.
+  // The severity level of a log is ranked as followed from low to high: DEBUG <
+  // INFO < NOTICE < WARNING < ERROR < CRITICAL < ALERT < EMERGENCY.
+  // See
+  // [LogSeverity](https://cloud.google.com/logging/docs/reference/v2/rest/v2/LogEntry#logseverity)
+  // for more information.
+  enum LogSeverity {
+    // Log severity is not specified. This is the same as log severity is OFF.
+    LOG_SEVERITY_UNSPECIFIED = 0;
+
+    // Log is turned off.
+    OFF = 1;
+
+    // Log with severity higher than or equal to DEBUG are logged.
+    DEBUG = 100;
+
+    // Logs with severity higher than or equal to INFO are logged.
+    INFO = 200;
+
+    // Logs with severity higher than or equal to WARNING are logged.
+    WARNING = 400;
+
+    // Logs with severity higher than or equal to ERROR are logged.
+    ERROR = 500;
+  }
+
+  // The severity level of platform logging for this resource.
+  LogSeverity log_severity = 1;
 }
 
 // Properties of the input stream.
diff --git a/google/cloud/video/livestream/v1/service.proto b/google/cloud/video/livestream/v1/service.proto
index fa1ccd1786310..c2c6f87979aa1 100644
--- a/google/cloud/video/livestream/v1/service.proto
+++ b/google/cloud/video/livestream/v1/service.proto
@@ -26,10 +26,13 @@ import "google/protobuf/empty.proto";
 import "google/protobuf/field_mask.proto";
 import "google/protobuf/timestamp.proto";
 
+option csharp_namespace = "Google.Cloud.Video.LiveStream.V1";
 option go_package = "google.golang.org/genproto/googleapis/cloud/video/livestream/v1;livestream";
 option java_multiple_files = true;
 option java_outer_classname = "ServiceProto";
 option java_package = "com.google.cloud.video.livestream.v1";
+option php_namespace = "Google\\Cloud\\Video\\LiveStream\\V1";
+option ruby_package = "Google::Cloud::Video::LiveStream::V1";
 
 // Using Live Stream API, you can generate live streams in the various
 // renditions and streaming formats. The streaming format include HTTP Live
@@ -325,6 +328,12 @@ message DeleteChannelRequest {
   // The request ID must be a valid UUID with the exception that zero UUID is
   // not supported `(00000000-0000-0000-0000-000000000000)`.
   string request_id = 2;
+
+  // If the `force` field is set to the default value of `false`, you must
+  // delete all of a channel's events before you can delete the channel itself.
+  // If the field is set to `true`, requests to delete a channel also delete
+  // associated channel events.
+  bool force = 3;
 }
 
 // Request message for "LivestreamService.UpdateChannel".