How can I create a Webflow navbar with a transparent background that changes to black after scrolling, similar to a specific website? Additionally, how can I achieve the same background video effect?

To create a Webflow navbar with a transparent background that changes to black after scrolling, you can follow these steps:

1. Add a navbar component to your Webflow project by dragging and dropping it onto your canvas from the Elements panel.

2. Customize your navbar by adding your desired content, such as your logo and navigation links.

3. Select the navbar element and go to the Element settings panel. Under the Position section, choose "Fixed" to ensure that the navbar stays fixed in place as you scroll.

4. Now, to make the background transparent, go to the Style panel and set the background color of the navbar to be transparent by either selecting the "None" option or using the color picker and setting the opacity to 0.

5. To make the background change to black after scrolling, you'll need to add some custom code. Click on the "Head" section of your page in the Navigator panel and then click on the "Custom Code" tab in the Settings panel.

6. In the " tag" of your page, paste the following code:

```html

```

Make sure to change the `.navbar` selector to match the class or ID of your actual navbar component.

Now, as you scroll down your page, the navbar background will change from transparent to black.

To achieve the same background video effect as the specific website you mentioned, you can use Webflow's background video feature. Follow these steps:

1. Upload your video file to Webflow. Webflow supports MP4, WebM, and Ogg formats. Go to the Assets panel and click the "Upload" button to upload your video.

2. Drag and drop a section element onto your canvas, placing it above your navbar.

3. Select the section element, and in the Style panel, set the desired height and width for your video section.

4. With the section element still selected, go to the Background section in the Style panel. Click on the "Background" dropdown and select "Video".

5. In the Background settings, choose your uploaded video file from the dropdown or the Assets panel.

6. Customize other settings like playback, options, and background fitting to achieve the desired effect.

That's it! You now have a Webflow navbar with a transparent background that changes to black after scrolling, as well as a background video effect on a specific section of your site.