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How to Troubleshoot SharePoint Embed URLs Returning 404 Errors
Question details
Users need to resolve an issue where a SharePoint video embedded on an external website successfully plays but generates a 404 Not Found API error in the background.
- Product
- Microsoft SharePoint
- Device & OS
- not provided
- Scenario
- Embedding a SharePoint video on an external public website or HTML editor.
- Observed behavior
- The embedded video plays properly, but browser developer tools reveal a 404 Not Found request directed to a SharePoint API endpoint.
Ensure you have access to the external website's code and can use browser developer tools (F12) to monitor network requests and API errors.
Test the Embed URL in a Private Browsing Window
Use an Incognito or Private window to determine if your existing SharePoint authentication is hiding the true access status of the embedded video.
Often, embedded SharePoint content appears to load correctly on an external site only because the current user is already authenticated with Microsoft 365 in their browser session. Testing in a private window isolates the authentication state.
Launch a new Incognito (Chrome) or InPrivate (Edge) browsing window to ensure no existing session data or cookies are active.
Paste the URL of the external webpage containing the SharePoint embed into the address bar and press Enter.
Press F12 to open Developer Tools, switch to the Network tab, and reload the page to see if the video fails to load or if the 404 API error persists without authentication.
Verify Site Authentication and Open a Support Request
Escalate the issue to your administrator if the 404 API error persists despite proper authentication configurations.
Try WPS Office for Seamless Document Management
While SharePoint and Microsoft 365 handle enterprise web video integrations, WPS Office provides a lightweight, free alternative for your daily document, spreadsheet, and presentation needs without complex API setups.
- 1. Download and Install: Get the free WPS Office installer from the official website and complete the quick installation.
- 2. Open Your Files: Double-click any existing Microsoft Office document to instantly open and edit it in WPS Office.
- 3. Save and Share: Save your work in standard formats like .docx or .xlsx for perfect compatibility with external collaborators.
Frequently Asked Questions
Why does the SharePoint video play successfully if there is a 404 error?
The video may continue to play because your browser is currently authenticated with an active Microsoft 365 or SharePoint session, allowing the media to stream even though a specific background API tracking or telemetry endpoint fails.
Do YouTube video embeds cause this same 404 error?
No. YouTube embeds utilize public, unauthenticated API endpoints designed for external sharing, which do not trigger the same cross-domain authentication API errors seen with enterprise tools like SharePoint.
How do I get browser logs for a Microsoft support ticket?
Open your web browser, press F12 to access Developer Tools, and navigate to the Network tab. Refresh the webpage where the embed is located, right-click the list of network requests, and select 'Save all as HAR with content' to send to your administrator.
