SOURCE FOOTAGE

User-provided file: D:/TrackArcFX/videos/Under_Bridge.mp4
Only source frames 0-149 are used. No external footage was added.
No license or ownership document was supplied with this handoff, and this
package does not assert that the source is royalty-free or commercially licensed.
Confirm the source rights before public or commercial use.
See SOURCE-PROVENANCE.json for the source hash and exact extraction timing.