added some instructions into tuto computer

tutos/computer.txt

@@ -28,3 +28,22 @@
 	**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"`
+
+**settings of firefox extension MultiTranslate :**
+	iframe {
+		/*min-width: 720px;*/
+		min-height: 600px;
+		border: none;
+		margin-top: -160px;
+	}
+	iframe ~ * {
+		display: none !important;
+	}
+