[YouTube] Add signatureTimestamp argument to TVHTML5 client requests

This argument, which has been forgot, is required to get valid
streaming URLs with this client.

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeStreamHelper.java

@@ -119,7 +119,8 @@ public final class YoutubeStreamHelper {
             @Nonnull final Localization localization,
             @Nonnull final ContentCountry contentCountry,
             @Nonnull final String videoId,
-            @Nonnull final String cpn) throws IOException, ExtractionException {
+            @Nonnull final String cpn,
+            final int signatureTimestamp) throws IOException, ExtractionException {
         final InnertubeClientRequestInfo innertubeClientRequestInfo =
                 new InnertubeClientRequestInfo(
                         new InnertubeClientRequestInfo.ClientInfo(
@@ -154,6 +155,8 @@ public final class YoutubeStreamHelper {
 
         addVideoIdCpnAndOkChecks(builder, videoId, cpn);
 
+        addPlaybackContext(builder, BASE_YT_DESKTOP_WATCH_URL + videoId, signatureTimestamp);
+
         final byte[] body = JsonWriter.string(builder.done())
                 .getBytes(StandardCharsets.UTF_8);
 

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java

@@ -941,7 +941,8 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
                 final JsonObject tvHtml5PlayerResponse =
                         YoutubeStreamHelper.getTvHtml5PlayerResponse(
-                                localization, contentCountry, videoId, html5Cpn);
+                                localization, contentCountry, videoId, html5Cpn,
+                                YoutubeJavaScriptPlayerManager.getSignatureTimestamp(videoId));
 
                 if (isPlayerResponseNotValid(tvHtml5PlayerResponse, videoId)) {
                     throw new ExtractionException("TVHTML5 player response is not valid");