Update documentations

README.md

@@ -139,7 +139,7 @@ BitTorrent) inside the web browser, as of today.
   * **NodeJS >= 8.x**
   * yarn
   * OpenSSL (cli)
-  * FFmpeg
+  * **FFmpeg >= 3.x**
 
 ## Run using Docker
 

support/doc/dependencies.md

@@ -1,10 +1,10 @@
 # Dependencies
 
 ## Debian / Ubuntu and derivatives
-  1. On a fresh Debian, as root user, install basic utility programs needed for the installation
+  1. On a fresh Debian/Ubuntu, as root user, install basic utility programs needed for the installation
  
 ```
-$ apt-get install curl sudo unzip vim
+# apt-get install curl sudo unzip vim
 ```
      
   2. It would be wise to disable root access and to continue this tutorial with a user with sudoers group access
@@ -20,6 +20,7 @@ $ apt-get install curl sudo unzip vim
 ```
 $ sudo apt update
 $ sudo apt install nginx ffmpeg postgresql openssl g++ make redis-server git
+$ ffmpeg -version # Should be >= 3.x 
 ```
 
 ## Arch Linux

support/doc/tools.md

@@ -9,8 +9,8 @@
 
 ## Prerequisites
 
-You need at least 512MB RAM to run the script.  
-Scripts can be launched directly from a PeerTube server (in this case you already have dependencies installed :+1:) or from a separate server, even a dekstop PC.  
+You need at least 512MB RAM to run the script.
+Scripts can be launched directly from a PeerTube server, or from a separate server, even a desktop PC.
 
 ### Dependencies
 
@@ -18,7 +18,7 @@ Install the [PeerTube dependencies](dependencies.md).
 
 ### Installation
 
-Clone the PeerTube repo to get the latest version:
+Clone the PeerTube repo to get the latest version (even if you are on your PeerTube server):
 
 ```
 git clone https://github.com/Chocobozzz/PeerTube.git