diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 2e824117ad..fba99af8dc 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -938,7 +938,7 @@ def _parse_filter(tokens):
                     filter_parts.append(string)
 
         def _remove_unused_ops(tokens):
-            # Remove operators that we don't use and join them with the sourrounding strings
+            # Remove operators that we don't use and join them with the surrounding strings
             # for example: 'mp4' '-' 'baseline' '-' '16x9' is converted to 'mp4-baseline-16x9'
             ALLOWED_OPS = ('/', '+', ',', '(', ')')
             last_string, last_start, last_end, last_line = None, None, None, None
diff --git a/youtube_dl/downloader/common.py b/youtube_dl/downloader/common.py
index 29a4500d3a..b8bf8daf8c 100644
--- a/youtube_dl/downloader/common.py
+++ b/youtube_dl/downloader/common.py
@@ -42,7 +42,7 @@ class FileDownloader(object):
     min_filesize:       Skip files smaller than this size
     max_filesize:       Skip files larger than this size
     xattr_set_filesize: Set ytdl.filesize user xattribute with expected size.
-                        (experimenatal)
+                        (experimental)
     external_downloader_args:  A list of additional command-line arguments for the
                         external downloader.
 
diff --git a/youtube_dl/downloader/rtmp.py b/youtube_dl/downloader/rtmp.py
index f1d219ba97..14d56db47d 100644
--- a/youtube_dl/downloader/rtmp.py
+++ b/youtube_dl/downloader/rtmp.py
@@ -117,7 +117,7 @@ def run_rtmpdump(args):
             return False
 
         # Download using rtmpdump. rtmpdump returns exit code 2 when
-        # the connection was interrumpted and resuming appears to be
+        # the connection was interrupted and resuming appears to be
         # possible. This is part of rtmpdump's normal usage, AFAIK.
         basic_args = [
             'rtmpdump', '--verbose', '-r', url,