Update README to simplify player controls section

Removed detailed player controls section and hover previews explanation from README.

README.md

@@ -131,26 +131,12 @@ Use `playlist.json` when you need different `--mode` or `--vol` settings for eac
 Open `http://localhost:8000` in your browser.
 
 ### Player Controls
-
-Once a video is playing, the page has a full control bar under it:
-
-* Play and pause with the button, by clicking the video, or with the space bar.
-* Skip back and forward ten seconds with the `«10` and `10»` buttons.
-* Drag the seek bar to jump anywhere. The filled part shows how far along you are.
-* Hover over the seek bar and a small picture of that moment pops up, so you can
-  find the spot you want before you let go.
-* A volume slider on the right.
-
-The bar wraps and the whole player scales down so it still works on small screens
-and phones.
-
-The hover previews come from a light preview sprite. The server builds it once per
-video the first time you hover, in a single quick ffmpeg pass, and keeps it in
-memory so nothing is written to disk. If you already have your own sprite, point
-the `/scrub` route at it instead.
-
-Hover previews are on by default. If you would rather not build them at all, start
-the server with `--no-thumbnails` and the rest of the player keeps working.
+Hover previews are built once per video on first hover and kept in memory. Start with
+```bash
+--no-thumbnails
+```
+to disable them.
+To use your own prebuilt sprite, point the /scrub route at it.
 
 ### 4. Run directly in Terminal (Standalone)
 If you prefer to bypass the web interface, you can render the video directly inside an ANSI-supported terminal (zero-flicker, true color):