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Fix Embedded Videos Appearing Blank and Not Playing in Microsoft Sway

Partner Editor Oct 9, 2026 868 views

Question details

Embedded videos in Microsoft Sway display a blank screen and cannot be played when viewed on desktop browsers.

How to Fix Videos Appearing Blank and Not Playing in Microsoft Sway

Product: Microsoft Sway
Device & OS: not provided
Scenario: Attempting to watch embedded videos within a Microsoft Sway presentation on desktop browsers like Google Chrome or Microsoft Edge.
Observed behavior: When selected, the video goes entirely blank and refuses to play on desktop browsers, despite playing successfully on a mobile device.

Before you start

Verify that your Microsoft Edge or Google Chrome browser is fully updated to the latest version, as outdated rendering engines frequently cause embedded media failures.

Solution 1Recommended

Test Video Playback in a Private Browsing Window

Use your browser's private or incognito mode to determine if cached data or third-party extensions are interfering with Sway video playback.

Browser extensions, ad blockers, or corrupted cache files can sometimes block media elements in web applications like Microsoft Sway. Running the browser in a private window bypasses most extensions and uses a fresh session.

Open a Private Window

Launch Microsoft Edge and press Ctrl+Shift+N to open an InPrivate window, or open Google Chrome and press Ctrl+Shift+N for an Incognito window.

Access Microsoft Sway

Navigate to Sway.office.com, log in with your Microsoft credentials, and open the presentation containing the problematic video.

Test the Video

Click on the embedded video to see if it plays normally. If it does, you will need to clear your browser's cache or disable conflicting extensions in your normal browsing window.

Test Video Playback in a Private Browsing Window

Clear Cache and Cookies: If private browsing resolves the issue, clear your browser history and cache from the settings menu to permanently fix playback in your standard window.

Solution 2

Collect HAR Logs and Contact Microsoft Support

If the video remains blank across all browsers, capture network diagnostics and escalate the issue to the Microsoft 365 admin team.

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Create Reliable Presentations with WPS Office

If you are tired of dealing with online connectivity issues or browser compatibility errors when presenting, consider switching to WPS Office. It is a powerful, lightweight desktop alternative that ensures your presentations and media files play flawlessly every time.

1. Download and Install: Visit the official WPS Office website and download the free desktop application for your operating system.
2. Open WPS Presentation: Launch the suite and open WPS Presentation to create a new file or import your existing Microsoft PowerPoint documents.
3. Insert Media Offline: Go to the Insert tab and add local videos directly into your slides, ensuring they will play reliably without depending on browser extensions or network connections.

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Frequently Asked Questions

Why does the Sway video play on my phone but remain blank on my computer?

Mobile browsers and apps often use distinct rendering engines and bypass desktop browser extensions. If the video works on mobile, the file itself is fine, indicating that a desktop browser extension, ad blocker, or corrupted cache is causing the blank screen.

What is a HAR log and why does Microsoft Support need it?

A HAR (HTTP Archive) log records the data exchange between your web browser and the website's server. Microsoft engineers use it to see exactly which video component or script failed to load, allowing them to troubleshoot Sway playback errors accurately.

Are there specific video formats that work best in Microsoft Sway?

Sway generally supports standard web-friendly formats like MP4. However, if a video is embedded via a third-party iframe (like YouTube or Vimeo), playback issues are more likely related to browser privacy settings or third-party cookie restrictions rather than the video format.

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