Wix declares that the maximum upload size is “15GB per file”, but it only accepts max 1GB. How do I upload larger files?
This is from the Wix Support Website. The error you may be experiencing is the length of the video. How long are the videos that you were trying to upload? Are you using a FREE website?
Upload and showcase your videos on your site with Wix Video. When using Wix Video for free, you can upload up to 30 minutes of video (10 minutes maximum per video) and stream up to 10 minutes of live video.