diff --git a/youtube_dl/extractor/panopto.py b/youtube_dl/extractor/panopto.py
index 56d65805f..0165f292c 100644
--- a/youtube_dl/extractor/panopto.py
+++ b/youtube_dl/extractor/panopto.py
@@ -17,6 +17,7 @@ import json
 
 
 class PanoptoBaseIE(InfoExtractor):
+    """The base class with common methods for Panopto extractors."""
 
     @classmethod
     def _match_organization(cls, url):
@@ -28,6 +29,7 @@ class PanoptoBaseIE(InfoExtractor):
 
 
 class PanoptoIE(PanoptoBaseIE):
+    """Extracts a single Panopto video including all available streams."""
 
     _VALID_URL = r'^https?:\/\/(?P<org>[a-z0-9]+)\.hosted\.panopto.com\/Panopto\/Pages\/Viewer\.aspx\?id=(?P<id>[a-f0-9-]+)'
 
@@ -130,6 +132,8 @@ class PanoptoIE(PanoptoBaseIE):
 
 
 class PanoptoFolderIE(PanoptoBaseIE):
+    """Recursively extracts a folder of Panopto videos, digging as far as possible into subfolders."""
+
     _VALID_URL = r'^https?:\/\/(?P<org>[a-z0-9]+)\.hosted\.panopto.com\/Panopto\/Pages\/Sessions\/List\.aspx#folderID=(?:"|%22)(?P<id>[a-f0-9-]+)'
 
     def _real_extract(self, url):