diff --git a/lib/plexapi/base.py b/lib/plexapi/base.py
index 9c735373..26b103b9 100644
--- a/lib/plexapi/base.py
+++ b/lib/plexapi/base.py
@@ -866,6 +866,8 @@ class Playable:
 
             if kwargs:
                 # So this seems to be a a lot slower but allows transcode.
+                kwargs['mediaIndex'] = self.media.index(part._parent())
+                kwargs['partIndex'] = part._parent().parts.index(part)
                 download_url = self.getStreamURL(**kwargs)
             else:
                 download_url = self._server.url(f'{part.key}?download=1')
diff --git a/lib/plexapi/const.py b/lib/plexapi/const.py
index 7568344e..b0fe7e7d 100644
--- a/lib/plexapi/const.py
+++ b/lib/plexapi/const.py
@@ -4,6 +4,6 @@
 # Library version
 MAJOR_VERSION = 4
 MINOR_VERSION = 15
-PATCH_VERSION = 13
+PATCH_VERSION = 15
 __short_version__ = f"{MAJOR_VERSION}.{MINOR_VERSION}"
 __version__ = f"{__short_version__}.{PATCH_VERSION}"
diff --git a/lib/plexapi/media.py b/lib/plexapi/media.py
index 43c5636d..56126dcb 100644
--- a/lib/plexapi/media.py
+++ b/lib/plexapi/media.py
@@ -478,6 +478,7 @@ class SubtitleStream(MediaPartStream):
         return self.setSelected()
 
 
+@utils.registerPlexObject
 class LyricStream(MediaPartStream):
     """ Represents a lyric stream within a :class:`~plexapi.media.MediaPart`.
 
diff --git a/lib/plexapi/myplex.py b/lib/plexapi/myplex.py
index 740b2398..bc40583e 100644
--- a/lib/plexapi/myplex.py
+++ b/lib/plexapi/myplex.py
@@ -1049,7 +1049,7 @@ class MyPlexAccount(PlexObject):
         self.query(key, params=params)
         return self
 
-    def searchDiscover(self, query, limit=30, libtype=None):
+    def searchDiscover(self, query, limit=30, libtype=None, providers='discover'):
         """ Search for movies and TV shows in Discover.
             Returns a list of :class:`~plexapi.video.Movie` and :class:`~plexapi.video.Show` objects.
 
@@ -1057,6 +1057,9 @@ class MyPlexAccount(PlexObject):
                 query (str): Search query.
                 limit (int, optional): Limit to the specified number of results. Default 30.
                 libtype (str, optional): 'movie' or 'show' to only return movies or shows, otherwise return all items.
+                providers (str, optional): 'discover' for default behavior
+                    or 'discover,PLEXAVOD' to also include the Plex ad-suported video service
+                    or 'discover,PLEXAVOD,PLEXTVOD' to also include the Plex video rental service
         """
         libtypes = {'movie': 'movies', 'show': 'tv'}
         libtype = libtypes.get(libtype, 'movies,tv')
@@ -1068,6 +1071,7 @@ class MyPlexAccount(PlexObject):
             'query': query,
             'limit': limit,
             'searchTypes': libtype,
+            'searchProviders': providers,
             'includeMetadata': 1
         }
 
diff --git a/lib/plexapi/server.py b/lib/plexapi/server.py
index 178ce82b..f39a423f 100644
--- a/lib/plexapi/server.py
+++ b/lib/plexapi/server.py
@@ -413,16 +413,17 @@ class PlexServer(PlexObject):
         return items
 
     def client(self, name):
-        """ Returns the :class:`~plexapi.client.PlexClient` that matches the specified name.
+        """ Returns the :class:`~plexapi.client.PlexClient` that matches the specified name
+            or machine identifier.
 
             Parameters:
-                name (str): Name of the client to return.
+                name (str): Name or machine identifier of the client to return.
 
             Raises:
                 :exc:`~plexapi.exceptions.NotFound`: Unknown client name.
         """
         for client in self.clients():
-            if client and client.title == name:
+            if client and (client.title == name or client.machineIdentifier == name):
                 return client
 
         raise NotFound(f'Unknown client name: {name}')