Vauria
That looks like all you need to know right there. You’re uploading an MP4 instead of a WEBM. Since those are unsupported, it can’t verify that anything else about your file is valid.
Image mime type (video/mp4) is invalid
That looks like all you need to know right there. You’re uploading an MP4 instead of a WEBM. Since those are unsupported, it can’t verify that anything else about your file is valid.