Video Playback Troubleshooting

• Cause: This happens when the browser or player cannot parse the file format (such as .wmv or .mov), or when cross-domain credentials for the video manifest are blocked.
• The Fix: Ensure your source video is an .mp4 file encoded with H.264 video and AAC audio. If the video was embedded from an external source, verify you have the proper CORS (Cross-Origin Resource Sharing) permissions set.

• Cause: Network bottlenecks, slow internet connections, or large backend metadata (MOOV atoms) that force the player to download large chunks of the file before playing.
• The Fix: Run a quick network speed test to ensure you can support the selected resolution. If you are a site owner/developer, re-encode your videos with the metadata placed at the start of the file using tools like FFmpeg.

• Cause: Hardware acceleration issues in your browser or an unsupported video codec.
• The Fix: Try disabling Hardware Acceleration in your browser's settings (found under Settings > System in most modern browsers) and then refreshing the page.

• Cause: Ad-blockers or ad-load errors (like Error 1001) where ad tags fail to deliver.
• The Fix: Pause your ad-blocker extension or whitelist the site to allow the ad server to communicate with the player.

• Cause: The site you are viewing might be experiencing downtime with its Content Delivery Network (CDN) or the JW Player service itself.
• The Fix: Check the JWX Status Dashboard to see if there are any widespread platform or streaming incidents in your region.

If the above fixes don't resolve your issue, please try accessing Pastest via a VPN in case your network is blocking the content (this can be the case in some regions as our videos are sometimes flagged as 'explicit' due to the amount of skin on show during patient examinations).