Rename sections and update video links

learn/agents/1-using-tools-with-agents.md

@@ -14,6 +14,9 @@ Keywords:
 
 # Using tools with agents
 
+<!-- IMAGE PLACEHOLDER - YouTube thumbnail embed showing the Customization UI -->
+<iframe width="560" height="315" src="https://www.youtube-nocookie.com/watch?v=wZrQ0TAfpFg" title="Using Tools with Agents" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 Tools are how agents act on your request. They search your workspace, read files, edit code, run terminal commands, fetch web content, and call external services. In this guide, you will start with a small task, choose only the tools the task needs, and decide when to use a tool set, approvals, or sandboxing.
 
 ## Prerequisites

learn/agents/2-extending-agents-with-mcp-servers.md

@@ -14,6 +14,8 @@ Keywords:
 
 # Extending agents with MCP servers
 
+<iframe width="560" height="315" src="https://www.youtube-nocookie.com/watch?v=Sf4qD7SS2NA" title="Extending Agents With MCP Servers" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 MCP servers connect agents to external tools and data sources. In this guide, you will install an MCP server, use one of its tools in chat, choose the right configuration scope, and decide when to sandbox the server.
 
 ## Prerequisites

learn/agents/3-agent-plugins.md

@@ -14,6 +14,9 @@ Keywords:
 
 # Agent plugins
 
+<!-- IMAGE PLACEHOLDER - YouTube thumbnail embed showing the Customization UI -->
+<iframe width="560" height="315" src="https://www.youtube-nocookie.com/watch?v=9lonfxt7dqU" title="Agent Plugins" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 Agent plugins bundle multiple customizations into one installable package. In this guide, you will inspect a plugin before installing it, use a plugin-provided command, and decide when a plugin is a better fit than separate local customizations.
 
 ## Prerequisites

learn/agents/4-using-third-party-agents-in-vs-code.md

@@ -14,6 +14,9 @@ Keywords:
 
 # Using third-party agents in VS Code
 
+<!-- IMAGE PLACEHOLDER - YouTube thumbnail embed showing the Customization UI -->
+<iframe width="560" height="315" src="https://www.youtube-nocookie.com/watch?v=OWYQ8Mn7KqE" title="Third Party Agents" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 Third-party agents let you use provider-specific agent experiences inside VS Code. In this guide, you will choose between local and cloud sessions, start a Claude or Codex session, and pick a permission mode that matches the task.
 
 ## Prerequisites

learn/toc.json

@@ -13,7 +13,7 @@
     ]
   },
   {
-    "name": "Customizations",
+    "name": "Agent Customizations",
     "area": "customizations",
     "description": "Learn how to shape AI in VS Code around your workflow using custom agents, instructions, skills, prompt files, and hooks.",
     "topics": [
@@ -28,7 +28,7 @@
     ]
   },
   {
-    "name": "Agents",
+    "name": "Agent Extensions",
     "area": "agents",
     "description": "Learn how to use tools, MCP servers, plugins, and third-party agents to extend agent workflows in VS Code.",
     "topics": [
@@ -38,4 +38,4 @@
       ["Using third-party agents in VS Code", "/learn/agents/4-using-third-party-agents-in-vs-code"]
     ]
   }
-]
+]