diff --git a/config_files/.zshrc b/config_files/.zshrc
index 70077b9..a9dd7e4 100644
--- a/config_files/.zshrc
+++ b/config_files/.zshrc
@@ -176,6 +176,8 @@
 # ----------------------------------------------------
 
 alias open="xdg-open"
+alias youtube-dl="~/bin/youtube-dl"
+alias ydl="~/bin/youtube-dl"
 
 
 
diff --git a/tutos/computer.txt b/tutos/computer.txt
index 3e7fe76..2063886 100644
--- a/tutos/computer.txt
+++ b/tutos/computer.txt
@@ -30,3 +30,60 @@
 	**to enable vi :** `export TERM=xterm`
 	**locked files on nextcloud :** https://help.nextcloud.com/t/file-is-locked-how-to-unlock/1883
 
+**youtube-dl for france.tv :**
+	https://github.com/ytdl-org/youtube-dl/issues/29956#issuecomment-1013345689
+
+**remap keyboard keys :**
+	/* FOR ONE SESSION */
+	**xev** open a program that gives informations about key events, like keycode
+	**xmodmap -pk | grep <keycode>** to find the name of the key, like Return
+	**xmodmap -e "keycode <keycode> = <name>"** ex: `xmodmap -e "keycode 62 = Return"`
+	/* OR FOREVER */
+	**sudo cp /usr/share/X11/xkb/symbols/pc /usr/share/X11/xkb/symbols/pc.bak** save the file
+	**sudo vim /usr/share/X11/xkb/symbols/pc** modify the file
+
+**settings of firefox extension MultiTranslate :**
+	iframe {
+		/*min-width: 720px;*/
+		min-height: 600px;
+		border: none;
+		margin-top: -160px;
+	}
+	iframe ~ * {
+		display: none !important;
+	}
+
+**open default sites with firefox :**
+	https://askubuntu.com/questions/79305/how-do-i-change-my-default-browser
+	**sudo update-alternatives --config x-www-browser**
+	**sudo update-alternatives --config gnome-www-browser**
+
+**change dns :**
+	https://learnubuntu.com/change-dns-server/
+	so far i just changed in /etc/resolv.conf
+
+**format usb :**
+	- list disk :
+		**df -h** mounted partitions, or
+		**lsblk** or
+		**sudo fdisk -l** for more informations
+	- unmount partitions :
+	**sudo umount /dev/sdb1** unmount usb, replace /dev/sdb1 with name of your usb
+	- if necessary, erase all memory :
+	**sudo dd if=/dev/zero of=/dev/sdb bs=4k status=progress && sync** sync to flush the cache
+	- if necessary, erase all partitions or create new ones :
+	**sudo fdisk /dev/sdb**
+		> Command (m for help): **o** for creating an empty partition table
+		> Command (m for help): **n** for creating a new one
+			> Select (default p): **<enter>** to select default p
+			> Partition number (default 1): **<enter>** to create a partition number 1
+			> First sector (default 2048): **<enter>** to start partition at begining
+			> Last sector (default xxxxxxxx): **<enter>** to give partition full size
+		> Command (m for help): **w** to write the changes (before that, nothing was really made)
+	- format partitions (re list before) :
+	**sudo mkfs -t vfat -n "<name>" /dev/sdb1** to format in fat32 (vfat) (MaKe FileSystem)
+
+**list of automatic settings :**
+	- change dns
+	- configure firefox addons
+	-