docs: link v0.4.0 demo videos (gathering/crafting + no-code content)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/admin-plugin.md

@@ -13,7 +13,7 @@ Attributes in the Explorer. It adds two toolbar buttons under **SurvivorCore**:
 The rest of this page covers the Survival Stats editor; both install the same way. It's the
 [Builder / Admin plugin](https://github.com/TemujinCalidius/SurvivorCore/issues/11).
 
-> 📹 **Demo:** [HUD, survival stats & the admin plugin in action](https://makertube.net/w/xqX7wfRpTqd9L9BkozCS1P)
+> 📹 **Demos:** [HUD, survival stats & the admin plugin](https://makertube.net/w/xqX7wfRpTqd9L9BkozCS1P) · [no-code item & gatherable creation](https://makertube.net/w/mCneurjoY3Av6yi48VsGQE)
 
 ## Install
 

docs/content-authoring.md

@@ -1,5 +1,7 @@
 # No-code content authoring
 
+> 📹 **Demo:** [creating an item + gatherable in the admin panel](https://makertube.net/w/mCneurjoY3Av6yi48VsGQE)
+
 The engine ships **zero** items, resources, or recipes — your game supplies them. You can do this
 two ways, and they coexist:
 

docs/crafting.md

@@ -4,7 +4,7 @@ Hand crafting closes the **gather → craft → use** loop: from your inventory,
 are consumed and its output produced — server-authoritative, via
 [`src/systems/Crafting.luau`](../src/systems/Crafting.luau).
 
-> 📹 Demo video: _coming soon_
+> 📹 **Demo:** [gathering & hand crafting in action](https://makertube.net/w/b6RWPeiW6vLz4iVXuuiRtP)
 
 ## Recipes
 

docs/harvesting.md

@@ -13,7 +13,7 @@ it validates, rolls a **per-hit yield** (`yieldMin..yieldMax`), tries to add it
 (**blocking the hit if you're full** — nothing wasted), then spends one HP and fires the hooks. On
 depletion the node is destroyed (unless it opts out — see reactions).
 
-> 📹 Demo video: _coming soon_
+> 📹 **Demo:** [chopping a tree, gathering reeds & hand crafting](https://makertube.net/w/b6RWPeiW6vLz4iVXuuiRtP)
 
 ## Defining a node