Steps to reproduce:
1. Open the attached user's project "UnityVideoTranscodeBugRepro.zip"
2. Make sure Parallel Import is enabled (Edit > Project Settings > Editor > Asset Pipeline)
3. Close the Editor and delete the project's Library folder
4. Open the project again and wait for the import to finish
5. Observe the Console window

Actual result: "Movie packing error [Assets/Videos/intro.webm]" is logged and the VideoClip is imported without video data
Expected result: No errors are logged and the VideoClip is imported with video data

Reproducible with: 6000.6.0a2 (64de5ee36373), 6000.6.7f1, 6000.7.0b6, 7000.0.0a12
Not reproducible with: 6000.0.85f1, 6000.3.27f1, 6000.6.0a1 (7dc703ab9bd8)

Testing Environment: Windows 11

Notes:
-Only reproducible with a fresh library import
-The underlying issue is with transcoding VideoClips out of process. It also reproduces in 6000.6.0a1 when launched with "-enableExperimentalOOPImporters -refreshImportMode outofprocessperqueue"
-Editor.log shows the import worker failing to write the artifact: "[Worker1] Closing file : The system cannot find the file specified. : VirtualArtifacts/Primary/<guid>.resource", followed by "Movie packing error" and "UDS Commit attempting to commit zero length file"
-intro_plain.webm (no transcoding) imports correctly out of process; only the transcoded clip (intro.webm) is affected
-Not reproducible with Parallel Import disabled, or when launching with "-refreshImportMode inprocess" (workarounds)