How can I make a background video fullscreen on Webflow, specifically on screens with a resolution of 1920px and above, while still maintaining full screen on all other resolutions? The video I have is 1920x1080 and I don't mind if it appears pixelated on larger resolutions as long as it fills the screen. Why is it so difficult to achieve this? I work with game engines but I'm still struggling with this tool.

You're trying to make a background video scale to 100% of the viewport on all screen sizes, including ultra-wide displays. In Webflow, achieving a true fullscreen background video seems tricky because of the combination of default video container behavior and object-fit properties.

1. Use a Background Video Element Correctly

• Add a Background Video from the Add Panel (Media → Background Video).
• Set the width and height to 100% of the viewport:
• Width: 100vw
• Height: 100vh
• This ensures the container fills the whole screen regardless of resolution.

2. Set Video Object Fitting to Cover

• Webflow automatically applies object-fit: cover to background videos.
• This setting ensures the video always fills the container (100vw x 100vh) without squishing, even if it means cropping some parts.

3. Remove Spacing and Overflow Restrictions

• Ensure the background video element or its parent containers have:
• No margin or padding
• Position: fixed or absolute, top: 0, left: 0
• Z-index: lower than other elements so it stays in the background
• Display: block or inline-block (not flex or grid unless needed)

4. Prevent Clipping or Scaling Issues

• Sometimes scaling problems happen when parent containers constrain dimensions unintentionally.
• Ensure no parent wrapper has a max-width or overflow: hidden unless done purposefully.
• For full control, place the video as a sibling or child of the Body, not inside complex layout grids or rows.

5. Add Fallback Styles for Smaller Devices (Optional)

• Pixelation is expected on screens larger than 1920px because the video source is only 1080p.
• If you want more control, set custom breakpoints and adjust background-size or crop styles for ultra-wide screens.

6. Why It's Complicated in Webflow

• Game engines give you rendering control, while Webflow is declarative and DOM-based, so you're working within the constraints of HTML/CSS.
• Unlike in Unity or Unreal where you can anchor and scale directly across canvases, in Webflow you're fighting CSS behavior like object-fit, container hierarchy, and the rendering layer stack.
• Webflow’s UI also limits how much you can directly manipulate video elements vs. raw CSS stylesheets.

Summary

To make your 1920x1080 background video fullscreen across all resolutions, set the video container to 100vw x 100vh, use object-fit: cover, and apply fixed or absolute positioning from the top-left corner. Double-check parent elements for unwanted constraints. Webflow makes this harder than a game engine because it's subject to browser rendering rules and lacks pixel-level canvas control.