Homepage & Mini-Site UI Refresh

I need a small update to refresh my B2B marketplace homepage and supplier mini-sites. Tasks: 1. Fix the small UI issues shown in the attached 8 screenshots. 2. Add a replaceable background header video while keeping the existing content visible... (Budget: $30 - $250 USD, Jobs: CSS, Frontend Development, Graphic Design, HTML, JavaScript, Mobile Development, PHP, UI / User Interface)