Gsap / scroll trigger / animation expert for fix

Hi - this is a fix to an existing job.

I have section (the second section 'What makes us different' in the example below) - which is sticky on scroll. When it sticks it starts a video carousel, and then slides horizontally through four videos before the page then continues to scroll.

I need to create an different animation / transition to the opening section - a diagonal split with each half moving up / down respectively to reveal the first video - rather than it just sliding to the first video.

I also have an issues where the page only continues to scroll when the final video has moved out of view scrolling - leaving me a blank section (currently the green section in the example). Instead I need the page to scroll while the last video is video.

I also need to ensure it works perfectly across browsers / devices.

The simplified version is here - https://staging.nickmortimer.co.uk/scroll/h-srcoll-test-ASH.html

For someone who is experienced in these scripts - I don't expect it to take very long but I'm open to quotes.