WebM video not showing/playing in Godot 4.4 (Windows 10/11)

Godot Version

Replace this line with your Godot version
Godot_v4.4.1-stable_win64

Question

Hello,

I’m encountering a persistent issue with WebM video playback in Godot Engine 4.4 on Windows 11.

Problem Description:
I have a WebM video file named scene01.webm.
This file plays perfectly fine in VLC Media Player (both video and audio are clear).
However, when I try to use it in Godot, the file does not appear in the FileSystem dock at all.

Steps I’ve taken:

  1. File Placement: I confirmed the exact Godot project root folder using “Open in File Manager” from the Godot Project Manager. I then manually copied scene01.webm directly into the res://videos/ folder within my project (e.g., D:/game/gugu's makalong /videos/scene01.webm). I did NOT drag-and-drop it directly into the Godot editor.
  2. Godot Editor Refresh: After copying, I launched Godot Editor (as administrator) and clicked the “Refresh” button in the FileSystem dock. The file still doesn’t appear.
  3. System Resources: I have successfully freed up C drive space to 28GB (from original 15.9GB/5GB) by uninstalling Unity and emptying the Recycle Bin. So, disk space should no longer be an issue.
  4. Software & Environment:
    • Godot Version: 4.4.1-stable_win64 (This should be filled in the format Godot_v4.4.1-stable_win64 but without Godot_v if the template just wants the version number)
    • Operating System: Windows 11
    • WebM Source: Exported from Shotcut (or HandBrake if you used it - please specify)
    • WebM Codecs (as seen in Shotcut/HandBrake settings or file info): VP9 Video, Opus Audio
    • Confirmed VLC Playback: Yes, plays perfectly.
  5. Troubleshooting Attempts:
    • Restarted computer multiple times.
    • Ran Godot Editor as administrator.

Expected Behavior:
The scene01.webm file should appear in the Godot FileSystem dock and be playable via a VideoStreamPlayer node.

Question:
What could be preventing Godot from recognizing or playing this WebM file, given that it works perfectly in VLC and system resources are now adequate?

Thank you for your help!

WebM was supported in core in Godot 3.x, but support for it was removed in 4.0 as it was too buggy and difficult to maintain.