Drop the hero film here as: helalia-sun.mp4

The home page ships a <video> pointing at assets/media/hero/helalia-sun.mp4
with assets/media/sliders/1724071808i1lGMKhW6z.jpg as the poster.
Until the mp4 exists the poster frame is what visitors see - that is intended.
No slideshow fallback.

Suggested encode: H.264 mp4, ~1920x1080, no audio track, 12-25s seamless loop,
under ~6 MB so it starts fast on Alexandria mobile networks.
