Update Readme

Author: FrancescoDeSimone

README.md

@@ -15,6 +15,12 @@ Fetch youtube url from your subscription
   ```
   make -j$(nproc)
   ```
+- run ./ytwatch
+
+Alternative build the appimage with the script:
+```
+./build_appimage.sh
+```
 
 # USAGE
 
@@ -25,25 +31,28 @@ Fetch youtube url from your subscription
    - Click on "Next step" and then on "Create export"
    - Click on the "Download" button after it appears
    - From the downloaded zip extract the .csv in the subscriptions folder
- - Run the application passing the csv (or save the csv in the default path ```XDG_CONFIG_HOME/ytwatch/subscriptions.csv```)
+ - Save the csv in the default path ```XDG_CONFIG_HOME/ytwatch/subscriptions.csv``` or specify a path with the environment variable
 
-  ```ytwatch [-p] subscriptions.csv```
+  ```ytwatch [-p] {channel name}```
 
 # Dependency
 
 * curl
 * fzf
 * ueberzug
 * fmt
+* devour (optional)
 
 # Configuration
 
 Ytwatch script use the current env variable
 
-|      ENV                |                     DESCRIPTION                       |
-|-------------------------|-------------------------------------------------------|
-|YTWATCH_SUBSCRIPTIONS_CSV|CSV subscriptions path                                 |
-|YTWATCH_PLAYER           |Video player (mpv default)                             |
-|YTWATCH_PLAYER_OPT       |Video player options                                   |
-|YTWATCH_SWALLOWER        |Swallow program (empty string for none, default devour)|
-|YTWATCH_SCRAPER          |Ytscraper path (current dir by default)                |
+|Environment Variable|Description|Default Value
+---------------------|-----------|------------
+|YTWATCH_SUBSCRIPTIONS_CSV|Path to the subscriptions CSV file|$XDG_CONFIG_HOME/ytwatch/subscriptions.csv
+|YTWATCH_PLAYER|Video player|mpv
+|YTWATCH_PLAYER_OPT|Video player options|"--playlist=-"
+|YTWATCH_SWALLOWER|Swallowed program|	devour
+|YTWATCH_SCRAPER|Ytscraper path|	"./ytscraper"
+|YTWATCH_UEBERZUGPP|Path to UeberzugPP binary|	/usr/local/bin/ueberzugpp
+|YTWATCH_FZF|Path to FZF binary|	fzf