Initial commit: Signal video-grabber bot

Group-chat bot that downloads videos from X/Instagram/YouTube/TikTok links
via yt-dlp and posts them back, plus /speed and /rev video toys.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cookies.txt.example

@@ -0,0 +1,16 @@
+# Netscape HTTP Cookie File
+#
+# This file holds the login cookies yt-dlp uses to download from sites that
+# require auth (X/Twitter, Instagram, YouTube, TikTok). It is gitignored on
+# purpose — it contains live session tokens. NEVER commit the real cookies.txt.
+#
+# How to populate it:
+#   1. Log into the site in your browser (for YouTube, use an incognito window
+#      and open youtube.com/robots.txt before exporting, then close the window
+#      WITHOUT signing out — Google rotates cookies the moment an extension
+#      reads them in a normal window).
+#   2. Export cookies with a "Get cookies.txt" style browser extension.
+#   3. Save them here as cookies.txt (tab-separated, Netscape format).
+#
+# Example line shape (domain, includeSubdomains, path, secure, expiry, name, value):
+# .x.com	TRUE	/	TRUE	1805251225	auth_token	REDACTED