Korthys critical power film: source and usage record ======================================================== Current hero assets: - critical-power-film.mp4: one silent, 35-second, four-shot loop. - critical-power-film-poster.webp: sharp still from the start of that film. The film uses genuine moving footage with straight cuts between four full shots. The final-to-first loop boundary is also a deliberate hard cut. There is no overlap, dissolve, transition through black, inserted hold, blur or zoom. It is not animated still imagery. No AI-generated motion, synthetic camera pan, blur or grain effect is added. HD source: native 1920x1080, 29.97 fps, H.264, approximately 6.27 Mb/s. Public HD master/rendition: https://www.dvidshub.net/video/787947.m3u8 https://d34w7g4gy10iej.cloudfront.net/video/2103/DOD_108243087/DOD_108243087-1920x1080-6221k-hls.m3u8 Downloaded HD source SHA256: f7a237cddfe9da1afff9d6aa6ca82808af341a83801d97f1a2d1bcdc7e85e48f Edit selected on 2026-10-16 (source timestamps): 1. Generator room: 00:53.600-01:01.200. 2. Switchgear room: 00:20.600-00:29.800. 3. Exhaust systems / generator room tilt: 01:01.600-01:11.600. 4. Exterior power infrastructure: 01:38.200-01:46.400. Shots 1 and 3 use a small 1792x1008 crop at x=0,y=0 to remove the far-right barrel label, resampled to the film's uniform 1920x1080 frame. Shots 2 and 4 retain the native full frame. Incidental manufacturer labels may remain in those equipment shots; no association or endorsement is claimed. No people or distinctive military insignia were observed in the selected shots. This is visual screening, not a rights-clearance warranty. Delivery: H.264 High / Level 4.1, 30 fps, yuv420p, fast-start MP4, no audio. The delivery remains below 20 MiB; encoding uses CRF 20 with a 5 Mb/s VBV cap. Browser playback: 0.9x speed, approximately 38.9 seconds per viewing cycle. Straight-cut edit: all four selected intervals are retained at full length, giving 1,050 frames at 30 fps. Cuts occur at 7.6, 16.8 and 26.8 seconds. Playback begins at source 00:53.600 and ends with the exterior shot; the browser loop cuts directly from the final exterior frame to the first generator frame. No source segment is repeated to blend the loop boundary or create a hold. Reproduction: scripts/prepare-critical-power-film.mjs validates the retained HD master's SHA256 and rebuilds the film/poster into a fresh output directory. The previous 576p video and extracted image slideshow are not used by the hero. Usage: Illustrative critical-power equipment imagery. The depicted installation is not a Korthys installation, customer site, partner, or endorsement. Official source: https://www.dvidshub.net/video/787947/mcas-miramar-powegrid-b-roll Source title (as published): MCAS Miramar Powegrid B-Roll Creator: Cpl Dylan Hess (page author heading: Lance Cpl. Dylan Hess) Publishing unit: Marine Corps Air Station Miramar Date filmed: 2020-09-24 Date posted: 2021-03-22 DVIDS video ID: 787947 VIRIN: 200924-M-GL635-895 Source filename: DOD_108243087 Source duration: approximately 2 minutes Subject: Diesel generator equipment inside the MCAS Miramar microgrid electrical-backup power plant. Rights evidence: The individual source page explicitly marks the work PUBLIC DOMAIN and identifies a U.S. Marine Corps videographer. U.S. government employee works prepared as official duties are generally not eligible for copyright protection in the United States. This is not a guarantee about other jurisdictions or separate third-party rights. Official commercial-use and limitations notice: https://www.dvidshub.net/about/copyright That notice expressly authorizes commercial use, requires the non-endorsement disclaimer to the maximum extent practicable, and requests that distinctive military marks and indicia suggesting endorsement be obscured. It does not waive personal publicity/privacy rights or third-party intellectual-property rights, and it provides no suitability warranty. Required visible non-endorsement wording from the current official notice: "The appearance of U.S. Department of War (DoW) visual information does not imply or constitute DoW endorsement." Archived preparation of the superseded short 576p film (2026-10-16): - Selected source interval: 00:53.600 through 01:00.800. - Original dimensions: 1024x576. Fixed crop: 960x540, x=0, y=18. - The crop removes edge equipment/barrel branding that enters on the right. - Inspected selected/prepared frames show no people, readable manufacturer branding, military insignia, or distinctive exterior-facility identity. This is a visual screening observation, not a rights-clearance warranty. - Encoded H.264 High/yuv420p at 30 fps with fast-start; no audio track. - Loop body: source 00:54.200 through 01:00.800, with its final 0.600 seconds dissolved into source 00:53.600 through 00:54.200. - Final loop duration: 6.600 seconds. No synthetic pan, zoom, generated motion, or AI-generated footage was added; only the source's actual camera motion. - Poster: first frame of the prepared loop, encoded as WebP. - Audio and nonessential source metadata removed. - Previous campus footage is retired from the public folders; it is not included in the current landing builds. This record documents sourcing and implementation constraints. It is not a legal opinion, indemnity, or promise of zero legal risk.