ImageBanner supports background video uploads

ImageBanner is not limited to static images. Background video uploads are supported in production.

What to expect

• You can upload a background video for an ImageBanner.
• If you were trying to use animation because the image field would not accept a .webm file, use the banner's video/background-video capability instead of treating the file as a static image.
• For the new banner experience, the slider-based implementation is used, and video is supported there as well.

Troubleshooting

If a .webm file is rejected specifically by an image-only upload field, that does not mean video banners are unsupported overall. It usually means the media needs to be uploaded through the banner's video/background-video path rather than the image field.