I asked your question exactly as you stated and;

according GROK AI:

**Here's the easiest and most reliable way to insert a YouTube music video into PowerPoint so it plays when clicked.** This works in recent versions of PowerPoint (Microsoft 365, 2021, etc.).

### Step 1: Get the YouTube Video URL
1. Go to the YouTube video (music track) in your browser.
2. Copy the full URL from the address bar (e.g., `https://www.youtube.com/watch?v=...`).

   **Tip:** For a cleaner start, you can use the **Share** button on YouTube → **Copy** (it gives a shareable link).

### Step 2: Insert the Video in PowerPoint
1. Open your PowerPoint presentation and go to the slide where you want the video.
2. Click the **Insert** tab on the ribbon.
3. In the **Media** group, click **Video** → **Online Video**.
4. Paste the YouTube URL into the box and click **Insert**.

The video thumbnail/placeholder should appear on your slide. You can resize and reposition it by dragging the corners.

### Step 3: Set It to Play When Clicked
1. Click to select the video on the slide.
2. Go to the **Playback** tab (it appears under Video Tools when the video is selected).
3. In the **Video Options** group, look for the **Start** dropdown.
4. Choose **When Clicked On**.

   - **When Clicked On** — Plays only when you directly click the video frame (best for your request).
   - **In Click Sequence** — Plays when you click anywhere on the slide (advances with your normal clicks).
   - **Automatically** — Starts as soon as the slide appears.

### Step 4: Test It
- Go to **Slide Show** mode (or press **F5** / **Shift + F5** for current slide).
- Click the video area to start playback. It should play directly from YouTube (requires an internet connection).

### Extra Tips
- **Trim or start at a specific time** — You can add parameters like `?start=30` to the URL (30 seconds in) before inserting, or use the embed code option in the Online Video dialog.
- **Make it bigger** — Drag the corners to make the player larger (it can go full-slide if desired).
- **Loop the music** — On the **Playback** tab, check **Loop Until Stopped**.
- **Internet required** — The video streams from YouTube, so you'll need a connection during the presentation.

This method is much better than downloading the video (avoids copyright issues and large file sizes).

If you run into any issues (e.g., the video doesn't play or the Playback tab options are limited), let me know your PowerPoint version and I can give more specific advice!