Maelstrom: Updated the README with trailer and Apple App Store release

SDL Commits
1 
From cb975c7effd511f73b238d797c7657ce7feb8c47 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Fri, 1 May 2026 06:54:21 -0700
Subject: [PATCH] Updated the README with trailer and Apple App Store release

---
 README.md | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 181e3ff5..c33e977d 100644
--- a/README.md
+++ b/README.md
@@ -14,11 +14,15 @@ In addition to being a faithful reproduction of the original game, this version
 Maelstrom is available for free on:
 - Steam: https://store.steampowered.com/app/4239950/Maelstrom
 - Google Play: Send me e-mail at slouken@libsdl.org to be added to the beta
-- Apple Store: https://testflight.apple.com/join/6rXqay1A
+- Apple Store: https://apps.apple.com/us/app/classic-maelstrom/id6760607912
 - Web: https://www.libsdl.org/projects/Maelstrom/play
 
 You can download the latest release and source code from [GitHub](https://github.com/libsdl-org/Maelstrom)
 
+## Gameplay Trailer
+
+[![Maelstrom 4.0 Trailer](https://img.youtube.com/vi/j6thG1qsXyk/0.jpg)](https://www.youtube.com/watch?v=j6thG1qsXyk)
+
 ## New Features
 
 ### Kid Mode
@@ -62,6 +66,13 @@ The usage is:
 macres --export [file] [output_directory]

+## Porting to SDL3
+
+I did a short series of live-stream videos documenting the initial port from SDL2 to SDL3, available on YouTube:
+* Maelstrom Port Part 1
+* Maelstrom Port Part 2
+* Maelstrom Port Part 3
+

Enjoy!