doc: make it clear what is castor

Author: stupside

README.md

@@ -23,25 +23,24 @@
 
 # Castor
 
-Imagine buying a very nice TV and figuring out it doesn't allow casting from random websites...
+Smart TVs won't cast arbitrary web video, and screen mirroring is laggy and drops resolution. Castor casts the real video stream instead, at full quality, from your terminal.
 
-- Then you switch to the longest **HDMI cable** you can find.
-- Then you start doing **screen mirroring**: your computer lags, resolution tanks, nothing feels right.
+Point Castor at a web page and it finds the video playing on it, extracts the stream, transcodes it to a format your TV can play, and casts in real time. It also takes a direct stream URL, or an IMDB/TMDB id it looks up on streaming sites you configure. Optionally it auto-generates subtitles and burns them into the picture.
 
-Castor is a CLI that extracts video streams from websites, handles format compatibility, and casts to your TV in real time, with optional auto-generated subtitles burned directly into the video.
+Castor hosts nothing itself; it drives a headless browser to capture the stream a page is already serving. The id lookup uses whatever sources you set in `config.yaml`, and everything else works on any page or stream you give it.
 
 <p align="center">
-  <img src=".github/images/screen-selection.png" alt="Browsing TMDB titles in the castor TUI" width="640"/>
+  <img src=".github/images/screen-selection.png" alt="Browsing titles in the castor TUI" width="640"/>
   <br/>
-  <sub><em>Run <code>castor cast</code> to browse trending titles, search TMDB, inspect posters and metadata, then cast, without leaving the terminal.</em></sub>
+  <sub><em>Run <code>castor cast</code> to browse and search titles, inspect posters and metadata, then cast, without leaving the terminal.</em></sub>
 </p>
 
 > [!NOTE]
-> **How does extraction work?**
+> **How extraction works**
 >
-> Castor launches a headless Chrome with a randomized browser fingerprint and stealth scripts to hide automation. It listens to all network activity via Chrome DevTools Protocol, captures video streams, then runs an action pipeline: click the page, navigate into the largest iframe, solve Cloudflare Turnstile if detected, and click again as fallback.
+> Castor launches headless Chrome with a randomized fingerprint and stealth scripts to hide automation. It watches all network traffic over the Chrome DevTools Protocol to capture the video stream, then runs a short action pipeline: click the page, navigate into the largest iframe, solve a Cloudflare Turnstile if one appears, and click again as a fallback.
 >
-> This works on most streaming websites but won't beat sophisticated bot protection.
+> This works on most streaming sites but won't beat sophisticated bot protection.
 
 
 ## Installation