screenshot; result of windows test

README.md

@@ -2,11 +2,11 @@
 
 An experiment inspired by Colin Wright's [Chartodon](https://mathstodon.xyz/@Chartodon).
 
-TODO: img
+[demo](assets/demo.webm) (video; 20 seconds)
 
 Cons:
-  * Doesn't run in a browser. You need to install two (small, reputable)
-    programs.
+  * Doesn't run in a browser. You need to install several small, reputable Lua
+    tools.
   * Not as pretty as Chartodon.
   * Might not work on Windows. Please report your experience if you try it.
 
@@ -31,6 +31,10 @@ download, open source and with a stellar reputation. I'll assume below that
 you can invoke it using the `lua` command, but that might vary depending on
 your OS.
 
+Install the [LuaRocks](https://luarocks.org) package manager. Or alternatively
+install the [luasec](https://github.com/brunoos/luasec) library for https
+access. (I haven't been able to get this working on Windows 11.)
+
 Install the [LÖVE](https://love2d.org) game engine. It's just a 5MB download,
 open-source and extremely well-behaved. I'll assume below that you can invoke
 it using the `love` command, but that might vary depending on your OS.
@@ -49,7 +53,7 @@ Click on a toot to copy its URL to the clipboard.
 To edit formatting you'll need to modify the code for the app. To do
 this live without restarting the app each time, download [the driver
 app](https://git.sr.ht/~akkartik/driver.love). Here's an example session
-using a fork of this repo:
+using a different app:
 
 ![making changes without restarting the app](assets/2.gif)