What is the best way to create an auto-playing video loop on a web page using Webflow, without using third-party tools or integrations like YouTube?

To create an auto-playing video loop on a web page using Webflow without relying on third-party tools or integrations like YouTube, you can leverage the power of HTML5 video and some custom code.

Here's a step-by-step guide on how to achieve this:

1. Prepare your video: Start by making sure that your video is properly formatted and optimized for web. Ideally, it should be in the MP4 format with H.264 video codec and AAC audio codec. You can use video editing software or online converters to achieve this.

2. Upload your video: In the Webflow Designer, go to the Assets panel and upload your video file. Once uploaded, take note of the file's URL, as you will need it later.

3. Add a video element: Drag and drop a video element onto your Webflow page where you want the video to appear. By default, the video element will have a placeholder thumbnail image.

4. Set up the video source: With the video element selected, go to the element's settings panel. Under the Video section, click on the "Add Video Source" button. In the source settings, select "Custom" as the source type.

5. Add the video URL: In the Custom video source settings, paste the URL of your uploaded video into the "Source" field. Use the appropriate URL format:

If your Webflow site is hosted on Webflow's servers:
`/your-video-file-name.mp4`

If your Webflow site is hosted externally:
`https://www.your-external-site.com/your-video-file-name.mp4`

6. Add autoplay and loop attributes: To make the video automatically play and loop, you will need to add some custom attributes to the video element. Select the video element, then go to the "Custom attributes" field in the element's settings panel.

Add the following attributes:
`autoplay loop muted playsinline`

The `autoplay` attribute will make the video start playing automatically, the `loop` attribute will make it continuously loop, the `muted` attribute will ensure it plays without sound, and the `playsinline` attribute will enable it to play within the page without opening in a separate player.

7. Style and position the video: Customize the style and position of the video element to fit your design using Webflow's design tools. You can adjust the width, height, aspect ratio, and other properties of the video element to ensure it looks good on different devices.

8. Preview and publish: Finally, give your page a preview to see if the video plays and loops correctly. If everything looks good, publish your Webflow site to make it live on the web.

With these steps, you can create an auto-playing video loop on a web page using Webflow's native capabilities, without relying on third-party tools or integrations.