Add video of TUI

Author: boyter

README.md

@@ -24,8 +24,9 @@ Licensed under MIT.
 
 [//]: # ([![asciicast](https://asciinema.org/a/589640.svg)](https://asciinema.org/a/589640))
 
+cs TUI demo
 
-<img alt="cs tui" src=https://github.com/boyter/cs/raw/master/cs_tui.png>
+https://github.com/user-attachments/assets/3b7f4bb2-d542-406d-9c53-29c0430dd60a
 
 ### Pitch: Why use cs?
 
@@ -427,4 +428,4 @@ Returns JSON with line-numbered file content and, for recognised source files, l
 
 Using `cs` commercially? If you want priority support for `cs` you can purchase a years worth https://boyter.gumroad.com/l/vvmyi which entitles you to priority direct email support from the developer.
 
-If not, raise a bug report... or don't. I'm not the boss of you.
+If not, raise a bug report... or don't. I'm not the boss of you.