Realistic AI Lifestyle Video

I want to recreate the vibe of the Instagram reel I linked (https://www.instagram.com/reel/DWTaTqLhxWg/?igsh=emd5aTRoaDNxd3N4) using generative-AI tools. The finished piece should feel like a natural, cinematic lifestyle moment shot against a lively cityscape—think dusk lighting, subtle motion, and believable depth of field—while still making it clear that the scene was built with AI, not stock footage.

Here is the creative direction in a nutshell:
• Core theme: lifestyle scene—people interacting naturally with their surroundings rather than a formal product demo.
• Visual treatment: photo-realistic animation (no cartoon or stylised abstraction). The realism has to hold up when viewed full-screen on Instagram Reels.
• Environment: modern city backdrop, with dynamic elements such as gentle traffic, soft neon signage, or moving clouds to keep the frame alive.

Deliverable: a fully rendered vertical video (1080×1920) suitable for Instagram Reels, complete with ambient sound design and colour-grade. I should be able to post it without further edits. Please outline the AI pipeline you intend to use—whether that involves Stable Diffusion/Midjourney for keyframes, Runway Gen-2, Pika, or any other tool—along with your plan for smoothing motion, lip-sync (if dialogue is added), and upscaling.

Acceptance criteria:
1. Length between 10–15 seconds, loop-friendly.
2. Consistent, coherent characters across frames with no morphing artefacts.
3. Realistic lighting that matches the cityscape environment.
4. File delivered in MP4 (H.264) under 25 MB.

If you have relevant samples of realistic AI-generated footage you’ve done, share them in your proposal so I can gauge style fit and turnaround time.