Read video from elfeed (v on elfeed entry) and feeds update

Add elfeed-view-mpv function to elfeed to play youtube video directly from emacs and using mpv.
Add the following youtube channels to elfeed: EmacsConf, Pyjamas, Matrixdotorg, ENS, System Crafters, Emacs confs,
CommCon, Linux fondation org, Arte, Talk Python and Python Bytes posdcast.

lisp/apps/elfeed.el

@@ -4,6 +4,27 @@
 
 ;; https://github.com/skeeto/elfeed
 ;; An Emacs web feeds client
+
+(require 'elfeed)
+
+;; From https://medium.com/emacs/using-elfeed-to-view-videos-6dfc798e51e6
+(defun elfeed-v-mpv (url)
+  "Watch a video from URL in MPV."
+  (async-shell-command (format "mpv --cache=yes --cache-secs=60 %s" url)))
+
+(defun elfeed-view-mpv (&optional use-generic-p)
+  "Youtube-feed link."
+  (interactive "P")
+  (let ((entries (elfeed-search-selected)))
+    (cl-loop for entry in entries
+             do (elfeed-untag entry 'unread)
+             when (elfeed-entry-link entry)
+             do (elfeed-v-mpv it))
+    (mapc #'elfeed-search-update-entry entries)
+    (unless (use-region-p) (forward-line))))
+
+(define-key elfeed-search-mode-map (kbd "v") 'elfeed-view-mpv)
+
 (use-package elfeed
   :ensure t
   :commands elfeed
@@ -15,10 +36,26 @@
           "https://blog.finxter.com/feed"
           "https://planet.emacslife.com/atom.xml"
           "https://planetpython.org/rss20.xml"
-          "http://www.reddit.com/r/emacs/.rss"
+;;          "http://www.reddit.com/r/emacs/.rss"
           "http://linuxfr.org/journaux.atom"
           "https://xkcd.com/atom.xml"
-          "https://pyjamas.live/feed.xml"
+          "https://medium.com/feed/tag/python"
+          "https://blog.devgenius.io/feed"
+          "https://mathspp.com/blog.atom"
+          "https://lwn.net/headlines/rss"
+          "https://nyxt.atlas.engineer/feed"
+          "https://pyvideo.org/feeds/all.rss.xml"
+          "https://toobnix.org/feeds/videos.xml?videoChannelId=154"                      ;; EmacsConf
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCWCFzEJd7PhVulMXwGjcYAA" ;; Pyjamas
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCVFkW-chclhuyYRbmmfwt6w" ;; Matrixdotorg
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCbn8O8WwMeoZsPRxgumfvAQ" ;; ENS
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCAiiOTio8Yu69c3XnR7nQBQ" ;; System Crafters
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCwuyodzTl_KdEKNuJmeo99A" ;; Emacs confs
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCe_eAP4ToqFLSxzvkTlNzUQ" ;; CommCon
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCfX55Sx5hEFjoC3cNs6mCUQ" ;; Linux foundation Org
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCwI-JbGNsojunnHbFAc0M4Q" ;; Arte
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCKPSmMfDsXTKrCZApukcJ7A" ;; Talk Python
+          "https://www.youtube.com/feeds/videos.xml?channel_id=UCK_eZkV9CYCxhdf9f0dEukA" ;; Python Bytes Podcast
           )))
 
 (provide 'apps/elfeed)