I examined all 210 frames of the Roadster teaser and also checked:
• Brightness/contrast enhancements
• Every glitch frame and temporal composites
• Forward and reversed audio
• Audio and stereo-difference spectrograms
• OCR, metadata, subtitles, and MP4 structure
No second coherent message, date, number, hidden speech, Morse code, or embedded payload was found. The occasional X-like pattern and apparent dots/dashes are unstable glitch artifacts rather than reliably decodable messages.