diff --git a/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/twitch/TwitchStreamAudioSourceManager.java b/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/twitch/TwitchStreamAudioSourceManager.java
index 9d23e7e5..b2066f4b 100644
--- a/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/twitch/TwitchStreamAudioSourceManager.java
+++ b/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/twitch/TwitchStreamAudioSourceManager.java
@@ -20,6 +20,8 @@
 import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.HttpClientBuilder;
 import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.DataInput;
 import java.io.DataOutput;
@@ -40,6 +42,7 @@
  * Audio source manager which detects Twitch tracks by URL.
  */
 public class TwitchStreamAudioSourceManager implements AudioSourceManager, HttpConfigurable {
+    private static final Logger log = LoggerFactory.getLogger(TwitchStreamAudioSourceManager.class);
     private static final String STREAM_NAME_REGEX = "^https://(?:www\\.|go\\.|m\\.)?twitch.tv/([^/]+)$";
     private static final Pattern streamNameRegex = Pattern.compile(STREAM_NAME_REGEX);
 
@@ -52,7 +55,14 @@ public class TwitchStreamAudioSourceManager implements AudioSourceManager, HttpC
      */
     public TwitchStreamAudioSourceManager() {
         httpInterfaceManager = HttpClientTools.createDefaultThreadLocalManager();
-        initRequestHeaders();
+
+        try {
+            initRequestHeaders();
+        } catch (FriendlyException e) {
+            log.warn("Failed to fetch Twitch source keys. " +
+                "Key fetching will be retried upon loading a Twitch track. " +
+                "This warning can be ignored unless the issue persists.", e);
+        }
     }
 
     public String getClientId() {
@@ -71,10 +81,13 @@ public String getSourceName() {
     @Override
     public AudioItem loadItem(AudioPlayerManager manager, AudioReference reference) {
         String streamName = getChannelIdentifierFromUrl(reference.identifier);
+
         if (streamName == null) {
             return null;
         }
 
+        initRequestHeaders();
+
         JsonBrowser channelInfo = fetchStreamChannelInfo(streamName).get("data").get("user");
 
         if (channelInfo == null || channelInfo.get("stream").get("type").isNull()) {
@@ -192,22 +205,32 @@ private JsonBrowser fetchStreamChannelInfo(String channelId) {
     }
 
     private void initRequestHeaders() {
-        try (HttpInterface httpInterface = getHttpInterface()) {
-            HttpGet get = new HttpGet(TwitchConstants.TWITCH_URL);
-            get.setHeader("Accept", "text/html");
-            CloseableHttpResponse response = httpInterface.execute(get);
-            HttpClientTools.assertSuccessWithContent(response, "twitch main page");
+        if (twitchClientId != null) {
+            return;
+        }
+
+        synchronized (this) {
+            if (twitchClientId != null) {
+                return;
+            }
+
+            try (HttpInterface httpInterface = getHttpInterface()) {
+                HttpGet get = new HttpGet(TwitchConstants.TWITCH_URL);
+                get.setHeader("Accept", "text/html");
+                CloseableHttpResponse response = httpInterface.execute(get);
+                HttpClientTools.assertSuccessWithContent(response, "twitch main page");
 
-            String responseText = EntityUtils.toString(response.getEntity());
-            twitchClientId = DataFormatTools.extractBetween(responseText, "clientId=\"", "\"");
+                String responseText = EntityUtils.toString(response.getEntity());
+                twitchClientId = DataFormatTools.extractBetween(responseText, "clientId=\"", "\"");
 
-            for (Header header : response.getAllHeaders()) {
-                if (header.getName().contains("Set-Cookie") && header.getValue().contains("unique_id=")) {
-                    twitchDeviceId = DataFormatTools.extractBetween(header.toString(), "unique_id=", ";");
+                for (Header header : response.getAllHeaders()) {
+                    if (header.getName().contains("Set-Cookie") && header.getValue().contains("unique_id=")) {
+                        twitchDeviceId = DataFormatTools.extractBetween(header.toString(), "unique_id=", ";");
+                    }
                 }
+            } catch (IOException e) {
+                throw new FriendlyException("Loading Twitch main page failed.", SUSPICIOUS, e);
             }
-        } catch (IOException e) {
-            throw new FriendlyException("Loading Twitch main page failed.", SUSPICIOUS, e);
         }
     }
 
diff --git a/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/youtube/YoutubeAudioSourceManager.java b/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/youtube/YoutubeAudioSourceManager.java
index bd55a680..d0ce9316 100644
--- a/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/youtube/YoutubeAudioSourceManager.java
+++ b/main/src/main/java/com/sedmelluq/discord/lavaplayer/source/youtube/YoutubeAudioSourceManager.java
@@ -37,7 +37,9 @@
 
 /**
  * Audio source manager that implements finding Youtube videos or playlists based on an URL or ID.
+ * This source manager is now deprecated. Please use <a href="/~https://github.com/lavalink-devs/youtube-source">youtube-source</a>
  */
+@Deprecated
 public class YoutubeAudioSourceManager implements AudioSourceManager, HttpConfigurable {
     private static final Logger log = LoggerFactory.getLogger(YoutubeAudioSourceManager.class);
 
@@ -56,7 +58,9 @@ public class YoutubeAudioSourceManager implements AudioSourceManager, HttpConfig
 
     /**
      * Create an instance with default settings.
+     * This source manager is now deprecated. Please use <a href="/~https://github.com/lavalink-devs/youtube-source">youtube-source</a>
      */
+    @Deprecated
     public YoutubeAudioSourceManager() {
         this(true, null, null);
     }
@@ -64,10 +68,13 @@ public YoutubeAudioSourceManager() {
     /**
      * Create an instance.
      *
+     * This source manager is now deprecated. Please use <a href="/~https://github.com/lavalink-devs/youtube-source">youtube-source</a>
+     *
      * @param allowSearch Whether to allow search queries as identifiers
      * @param email       Email of Google account to auth in, required for playing age restricted tracks
      * @param password    Password of Google account to auth in, required for playing age restricted tracks
      */
+    @Deprecated
     public YoutubeAudioSourceManager(boolean allowSearch, String email, String password) {
         this(
             allowSearch,
@@ -83,6 +90,10 @@ public YoutubeAudioSourceManager(boolean allowSearch, String email, String passw
         );
     }
 
+    /**
+     * This source manager is now deprecated. Please use <a href="/~https://github.com/lavalink-devs/youtube-source">youtube-source</a>
+     */
+    @Deprecated
     public YoutubeAudioSourceManager(
         boolean allowSearch,
         String email,