Hi there! I understand you're having trouble with the Bubble CoCo app — specifically, it can't request keys, and not all videos are playing. Let's work through this together.

To get started, could you tell me more about when these issues occur? For example:
- Are you seeing any error messages when the app tries to request keys?
- Are the videos failing to load entirely, or do they start but then stop?
- Have you tried refreshing the game page or restarting the app already?
- Are cookies enabled in your browser since some video services like Vimeo and YouTube require them to play videos?

From what I've seen, enabling cookies often solves video playback problems because these platforms use cookie data to authenticate video requests. Also, refreshing the game page after a known fix has resolved similar key-requesting issues in the past.

Here's a quick step-by-step you can try right now:

1. Clear your browser cache and cookies to remove any corrupted data.
2. Ensure cookies are enabled in your WebKit browser on Windows 10.
3. Refresh the Bubble CoCo game page completely (press Ctrl + F5 to do a hard refresh).
4. Try to request keys again and play videos.

If those simple fixes don't work, we can dig deeper into your app settings, network connection, or possible server-side issues.

Let me know how these steps go or if you notice any specific error details. I’m here to help!