To resolve the issue of not being able to download videos using Zeemo due to permission denial, follow these steps:

1. Check App Permissions:
- Open your device's Settings app.
- Go to Apps or Applications.
- Scroll to find Zeemo and tap on it.
- Select Permissions and ensure that appropriate permissions (like Storage) are granted for Zeemo to save downloaded files.

2. Update Zeemo:
- Launch the Google Play Store.
- Search for Zeemo to see if an update is available.
- If an update is found, tap on Update to install the latest version, which may resolve permission issues.

3. Clear App Cache and Data:
- Go back to Settings > Apps > Zeemo.
- Tap on Storage.
- Select Clear Cache and then Clear Data. Note that clearing data may reset the app to its original settings.

4. Reinstall Zeemo:
- If the issue persists, uninstall the app.
- Reinstall it from the Google Play Store to ensure a clean version is in place that may resolve any underlying issues linked to the current installation.

5. Ensure Internet Connectivity:
- Check your internet connection as a poor connection can sometimes cause issues with downloading.
- Switch between Wi-Fi and mobile data to see if that resolves the downloading problem.

6. Follow Correct Download Procedures:
- Ensure you're using the correct method to download videos. For instance, visit Zeemo’s guides on how to download videos from platforms like YouTube and TikTok:
- For YouTube: How to download YouTube videos - [learn more]
- For TikTok: How to download TikTok videos - [learn more]

If after following these steps the problem still exists, consider checking Zeemo’s support options or community forums for additional troubleshooting assistance.