2. Add a Lander Video Loop

Add a looping video of the Party lander to the Party surface.

Implementation notes:

• Preferred HTML behavior: autoplay, muted, loop, playsinline.
• Do not show native controls unless the user asks for them.
• The video should feel integrated into the Party page, not like a separate framed card.
• Use a local asset path once the video exists, for example assets/video/party-lander-loop.mp4 or assets/video/party-lander-loop.webm.
• If the asset is not available yet, create a clean, named slot only if that does not create broken media references.

Acceptance criteria:

• No broken video reference ships.
• The video does not overlap timeline text or orb controls on desktop or mobile.
• The visual hierarchy remains sleek, low-text, and mostly visual.