Uploading images, video, audio and files
Wherever a category's entry form asks for a photo, video, audio clip or document, you'll see an upload control right on that question. Click it, choose your file, and wait for the upload to finish (larger video/audio files take longer) before uploading the next one or saving the page: uploading several at once can cause one to fail silently.
If a file won't upload, check its size and format against what's asked for on that question (shown next to the upload control): very large video files in particular may need compressing first.
Once uploaded, a file shows as attached to that question; you can replace it by uploading again, or remove it, any time before entries close for your category.