[codex] update English tutorial videos

apps/docs/content/tutorials/en/deploy.mdx

@@ -3,6 +3,8 @@ title: One-click deploy
 description: Pick a deploy backend, configure a profile, and ship one project with one deploy. The shortest path.
 ---
 
+<VideoEmbed provider="youtube" videoId="6Fp76iknXXg" title="Deploy a project with one deploy" />
+
 This tutorial walks one project to one target. The full menu — all 10 deploy backends, per-project flags, multi-environment trees — lives in [Multi-backend deploy](/en/tutorials/deploy-multi-backend/) (advanced).
 
 We'll pick the deploy backend that matches your project's template default. Each template ships with a sensible default; you can override later.

apps/docs/content/tutorials/en/first-workspace.mdx

@@ -3,6 +3,8 @@ title: Manual workspace
 description: Run one create yourself in the terminal. See what gets written to disk, what manifest it produces, and what default backends get wired.
 ---
 
+<VideoEmbed provider="youtube" videoId="aWwMxfFQW1g" title="Create a One CLI workspace manually" />
+
 This tutorial covers exactly one command: `one create`. Picking which templates to use is the [previous chapter](/en/tutorials/templates/); deploying for the first time is the [next chapter](/en/tutorials/deploy/).
 
 ## 1. Install the CLI

apps/docs/content/tutorials/en/skills-install.mdx

@@ -3,6 +3,8 @@ title: Install one cli skill
 description: Run one skills install so Claude Code, Cursor, Codex (and 50+ other coding agents) can drive One CLI for you.
 ---
 
+<VideoEmbed provider="youtube" videoId="vUUqqBilNrk" title="Install the one-cli skill for coding agents" />
+
 The `one-cli` skill is a bundled agent skill — a markdown package that teaches a coding agent how to use One CLI safely (read JSON output, recover from error codes, pick the right template, install dependencies for the right toolchain). Once it's installed, you can say "add a NestJS API called user-api" and the agent runs `one add nestjs-api --name user-api -o json` for you.
 
 `one create` already runs the equivalent of this command for detected agents. This tutorial is for cases where you want to install it explicitly, or to install to additional agents later.

apps/docs/content/tutorials/en/templates.mdx

@@ -3,6 +3,8 @@ title: One-click workspace
 description: Pick a template and deploy target on the templates page, then copy the generated one create command into your terminal — no config files to touch.
 ---
 
+<VideoEmbed provider="youtube" videoId="F2-RrInEnd4" title="Pick a One CLI template and copy a one create command" />
+
 This is the page you open before you create a workspace. It does two things:
 
 1. Shows the **preset templates** One CLI ships with — what each one is, what stack it uses, where it can deploy.

apps/docs/src/components/video-embed.tsx

@@ -24,7 +24,7 @@ export function VideoEmbed({ provider, videoId, title }: VideoEmbedProps) {
         allow="autoplay; encrypted-media; picture-in-picture; fullscreen"
         allowFullScreen
         loading="lazy"
-        referrerPolicy="no-referrer"
+        referrerPolicy="strict-origin-when-cross-origin"
         src={src}
         title={title ?? "Tutorial video"}
       />