A. Check your internet connection to ensure it is stable. If you are on Wi-Fi, try switching to mobile data or vice versa. Restart your router if necessary. Next, ensure that the app has the necessary permissions to access storage. Go to Settings > Privacy > Photos and ensure the app is allowed to access your photos and videos. If the issue persists, try clearing the app's cache. Go to Settings > General > iPhone Storage, find the app, and select 'Offload App' to clear temporary files without deleting your data. Reinstall the app if needed.

B. Check if there are any updates available for the app in the App Store. Sometimes, bugs are fixed in newer versions. If an update is available, install it and try downloading videos again.