Hi there! I see you're having an issue where the Chordify app shows "video not available" on all songs. Let's get this sorted for you.

To start, does this issue happen for every song you try, or just specific ones? Also, have you noticed if this started happening after an update to the app or Windows, or maybe your internet connection changed recently?

In the meantime, here are some initial steps to try:

1. Check Internet Connection: Ensure you have a stable internet connection because the app streams videos from YouTube, so connectivity matters.

2. Clear Cache and Data: Sometimes, app cache can cause such issues. Since you're on Windows, if you are using the Chordify web app, try clearing your browser cache and cookies. If using a desktop app, look for a settings or help menu to clear temporary data.

3. Try a Different Browser or Device: If you're using the web version, try opening Chordify in another browser like Chrome or Firefox to see if videos load.

4. Update the App or Browser: Make sure your app or browser is up to date to avoid compatibility issues.

If these don't work, the "video not available" message can sometimes occur if the YouTube videos that Chordify links to are removed, made private, or restricted in your region. In that case, Chordify cannot display the video even if the chords are available.

Does this give you any clues? Let me know what you find or if you’ve already tried any of these steps! We can go further from there.