WEBM/MKV thumbnails and Quick Look previews not working in ForkLift 4.6.3 with QLVideo on macOS 26

[keendot]

Thanks for the great work on ForkLift. I've been a happy user for a long time and it's become one of my essential macOS apps.
While investigating a thumbnail issue, I found what appears to be a compatibility problem with recent versions of QLVideo.

Environment:

• macOS 26
• ForkLift 4.6.3 (474)
• Installed via Setapp
• QLVideo (latest version from GitHub)
• QLVideo extension is properly registered and working

Issue:
WEBM and MKV files do not show thumbnails, Quick Look previews, or media metadata in ForkLift.

Steps to reproduce:

1. Install the latest version of QLVideo.
2. Open a folder containing WEBM or MKV files in ForkLift.
3. Enable thumbnail view or select a file and press Space.

Expected result:

• Thumbnail is displayed.
• Quick Look preview works.
• Media metadata (duration, resolution, codec information, etc.) is available.

Actual result:

• Generic file icon is displayed instead of a thumbnail.
• Pressing Space shows only the file icon.
• No media metadata is available.

Additional observations:

• Finder displays thumbnails correctly.
• Finder Quick Look preview works correctly and plays the video.
• QLVideo is properly registered and functioning in Finder.
• MP4, MOV, JPG, GIF, and WEBP files work normally in ForkLift.
• The issue only affects formats provided through QLVideo (WEBM and MKV).
• mdls reports WEBM files correctly as org.webmproject.webm.
• Older QLVideo version 2.20 worked correctly in ForkLift and displayed thumbnails for WEBM/MKV files.
• The problem appears only with recent QLVideo versions.

[Marginal]

Thumbnails and previews: Please ask the Forklift developers to call MTRegisterProfessionalVideoWorkflowFormatReaders and VTRegisterProfessionalVideoWorkflowVideoDecoders to enable thumbnails and previews supplied by this app's (and any other app's) Media Extensions.

Metadata: In your screenshot I can see Codecs and Duration metadata supplied by this app, so it looks like this is working.