Alright, first things first, log into your Webflow dashboard with your credentials. If you’re new and don’t have an account yet, go ahead and sign up. It’s quick!

Once you’re in, find the project where you want to add that snazzy background video. Click on it to open.

In the Webflow Designer, head over to the page section where you want the video background. You can do this by selecting the page from the Pages panel on the left sidebar. Easy peasy.

To add your background video, you’ll need a section or a div block. Click on the "+" icon to open the Add Elements panel, then drag a "Section" or "Div Block" to your design canvas.

In the Add Elements panel, scroll down until you find the "Background Video" element. Drag and drop it into the section or div block you just added.

Click on the Background Video element in your design canvas to open the settings panel. There, click on "Choose Video" to upload your video file. Webflow supports MP4, WebM, and Ogg formats, with a max file size of 30MB.

After uploading, you can tweak the video settings like looping, playback speed, and add some styles. Use the settings panel on the right to make these adjustments.

If you need an overlay, add a div block inside the section or div block with the video, and give it a semi-transparent background color. You can also add any text or other elements over the video.

Once you’re happy with how everything looks, click on the "Publish" button in the top-right corner of the Webflow Designer to make your changes live.

Finally, visit the published page to make sure the background video works as expected across different browsers and devices. Make any further adjustments if needed.