diff --git a/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix b/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix
index 55dea78ebf4a..174dab625a7b 100644
--- a/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/signal-desktop/default.nix
@@ -23,7 +23,7 @@ let
       --set LC_MESSAGES "${spellcheckerLanguage}"'');
 in stdenv.mkDerivation rec {
   pname = "signal-desktop";
-  version = "5.19.0"; # Please backport all updates to the stable channel.
+  version = "5.20.0"; # Please backport all updates to the stable channel.
   # All releases have a limited lifetime and "expire" 90 days after the release.
   # When releases "expire" the application becomes unusable until an update is
   # applied. The expiration date for the current release can be extracted with:
@@ -33,7 +33,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "https://updates.signal.org/desktop/apt/pool/main/s/signal-desktop/signal-desktop_${version}_amd64.deb";
-    sha256 = "0avns5axcfs8x9sv7hyjxi1cr7gag00avfj0h99wgn251b313g1a";
+    sha256 = "0a57gajxjqkp7zcmjc3iiys06b7v53nd81gkwrsfn2gmshihlzkd";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/servers/openafs/1.9/srcs.nix b/pkgs/servers/openafs/1.9/srcs.nix
index 8c5f63cac111..853cd2aabad9 100644
--- a/pkgs/servers/openafs/1.9/srcs.nix
+++ b/pkgs/servers/openafs/1.9/srcs.nix
@@ -1,14 +1,14 @@
 { fetchurl }:
 rec {
-  version = "1.9.0";
+  version = "1.9.1";
   src = fetchurl {
     url = "https://www.openafs.org/dl/openafs/${version}/openafs-${version}-src.tar.bz2";
-    sha256 = "1jw99zwisq25l0smdm8f0gfwhynk532s2ch44blrvxyd7all8kcd";
+    sha256 = "sha256-7rHihVR4VobHAzt0ZALFOLJnlfd1Qwsa5ohpRFWBPbw=";
   };
 
   srcs = [ src
     (fetchurl {
       url = "https://www.openafs.org/dl/openafs/${version}/openafs-${version}-doc.tar.bz2";
-      sha256 = "03x1pv8l4bv2fdns1l4sfy200nggy0a4b1f7qd0mnggdaj12c4jp";
+      sha256 = "sha256-pvF8CdTl+5DNuymNvhb3UrGW05LcXRv8cZp2QQlXF+E=";
     })];
 }
diff --git a/pkgs/tools/misc/yt-dlp/default.nix b/pkgs/tools/misc/yt-dlp/default.nix
new file mode 100644
index 000000000000..c5ae63527253
--- /dev/null
+++ b/pkgs/tools/misc/yt-dlp/default.nix
@@ -0,0 +1,73 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, ffmpeg
+, rtmpdump
+, phantomjs2
+, atomicparsley
+, pycryptodomex
+, websockets
+, mutagen
+, ffmpegSupport ? true
+, rtmpSupport ? true
+, phantomjsSupport ? false
+, hlsEncryptedSupport ? true
+, withAlias ? false # Provides bin/youtube-dl for backcompat
+}:
+
+buildPythonPackage rec {
+  pname = "yt-dlp";
+  # The websites yt-dlp deals with are a very moving target. That means that
+  # downloads break constantly. Because of that, updates should always be backported
+  # to the latest stable release.
+  version = "2021.10.10";
+
+  src = fetchPypi {
+    inherit pname;
+    version = builtins.replaceStrings [ ".0" ] [ "." ] version;
+    sha256 = "sha256-zJYhHo5V67tI0uZgnA0JQlB+tUcbLOdOOPe5X41wpOc=";
+  };
+
+  propagatedBuildInputs = [ websockets mutagen ]
+    ++ lib.optional hlsEncryptedSupport pycryptodomex;
+
+  # Ensure these utilities are available in $PATH:
+  # - ffmpeg: post-processing & transcoding support
+  # - rtmpdump: download files over RTMP
+  # - atomicparsley: embedding thumbnails
+  makeWrapperArgs =
+    let
+      packagesToBinPath = [ atomicparsley ]
+        ++ lib.optional ffmpegSupport ffmpeg
+        ++ lib.optional rtmpSupport rtmpdump
+        ++ lib.optional phantomjsSupport phantomjs2;
+    in
+    [ ''--prefix PATH : "${lib.makeBinPath packagesToBinPath}"'' ];
+
+  setupPyBuildFlags = [
+    "build_lazy_extractors"
+  ];
+
+  # Requires network
+  doCheck = false;
+
+  postInstall = lib.optionalString withAlias ''
+      ln -s "$out/bin/yt-dlp" "$out/bin/youtube-dl"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/yt-dlp/yt-dlp/";
+    description = "Command-line tool to download videos from YouTube.com and other sites (youtube-dl fork)";
+    changelog = "https://github.com/yt-dlp/yt-dlp/raw/${version}/Changelog.md";
+    longDescription = ''
+      yt-dlp is a youtube-dl fork based on the now inactive youtube-dlc.
+
+      youtube-dl is a small, Python-based command-line program
+      to download videos from YouTube.com and a few more sites.
+      youtube-dl is released to the public domain, which means
+      you can modify it, redistribute it or use it however you like.
+    '';
+    license = licenses.unlicense;
+    maintainers = with maintainers; [ mkg20001 ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index a382bf668687..36f6bef21959 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -27787,6 +27787,10 @@ in
 
   youtube-dl-light = with python3Packages; toPythonApplication youtube-dl-light;
 
+  yt-dlp = with python3Packages; toPythonApplication yt-dlp;
+
+  yt-dlp-light = with python3Packages; toPythonApplication yt-dlp-light;
+
   youtube-viewer = perlPackages.WWWYoutubeViewer;
 
   ytalk = callPackage ../applications/networking/instant-messengers/ytalk { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index bc6aee8c42d9..b55593e20656 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -9031,6 +9031,13 @@ in {
     phantomjsSupport = false;
   };
 
+  yt-dlp = callPackage ../tools/misc/yt-dlp { };
+
+  yt-dlp-light = callPackage ../tools/misc/yt-dlp {
+    ffmpegSupport = false;
+    phantomjsSupport = false;
+  };
+
   yowsup = callPackage ../development/python-modules/yowsup { };
 
   yq = callPackage ../development/python-modules/yq {