Hi there! I’m sorry to hear that you're having trouble playing videos on the Substack app. That can be really frustrating. Let's see if we can get that sorted out.

Can you please tell me a bit more about the issue? For example:
- Are you receiving any error messages when trying to play the videos?
- Has this issue been happening with all videos or just specific ones?
- Have you tried any troubleshooting steps so far, like closing and reopening the app, or checking your internet connection?

This information will help me guide you better!

All videos

Thanks for the clarification! Since you’re experiencing video playback issues on the Substack app with all videos, let's work through some troubleshooting steps.

### Step 1: Check Internet Connection
1. Wi-Fi or Cellular Data: Make sure you have a stable internet connection. Try switching between Wi-Fi and cellular data to see if that resolves the issue.
2. Testing Speed: You can use a speed test app or website to confirm your current speed.

### Step 2: Update the App
- Ensure that the Substack app is updated to the latest version. You can do this by going to the App Store, searching for Substack, and tapping "Update" if it's available.

### Step 3: Restart the App
1. Close the Substack app completely. You can do this by swiping up from the bottom of the screen and sliding the Substack app off the screen.
2. Reopen the app and try playing a video again.

### Step 4: Clear Cache
1. In the app settings, look for an option to clear cache or reset app settings (not all apps have this feature).
2. If clearing cache isn't an option, try uninstalling the app and then reinstalling it from the App Store.

### Step 5: Check Permissions
- Make sure the Substack app has the necessary permissions to access media. You can check this by going to:
- Settings > Privacy > Media & Apple Music and ensure that Substack is enabled.

### Step 6: Restart Your Device
- Sometimes a simple restart of your iPhone can help resolve many issues.

If you've tried all these steps and videos are still not playing, it might be worth checking the Substack help page for video-related issues here1.

If the problem persists after that, we may need to consider contacting Substack support directly at [email protected] for further assistance.

Are you satisfied with this solution, or is there anything else I can assist you with?