File appears in Adobe server before FileZilla upload has finished. (???)

Thank you jacquelingphoto2017 for your answer.

However, I still don't understand.

When yo say "when building websites time is set for the duration of certain activity and the duration of progress bars", are you referring to the configuration settings of the Adobe Stock website?

Here's the thing: right now when I look at my Adobe Stock panel for "New files", there are several instances of my videos that appear as if they had been uploaded twice, but none of those versions is actually complete. For instance, one video is 25 seconds long in my hard drive, but the two uploaded versions of that same video are 7" seconds and 19" seconds, so both are cut short, one worse than the other. As far as I know, I only uploaded once.

I'll proceed to delete both versions instead of submitting them for revision, then I'll try to upload it again. But I'd like to understand what's happening so I can avoid these errors in the future, specially since uploading each video using FileZilla takes several hours.

Another (related) question: a video that was recently rejected seems to be perfectly fine. I do understand (and accept) that Adobe Stock has a team of people tasked to evaluate and approve or reject all submissions, based on technical aspects but also on commercial appeal, etc. So far I've had 92 approvals and 1o rejections, so I feel I'm generally doing OK. But I want to better understand the criteria in order to improve my submissions. There's one particular video that seems to me should have been acceptable but was rejected, so now I'm wondering if that one too was cut short and I failed to notice that before sending it for review. However, once it's been moved to the "rejected" panel, it cannot be played in order to check if that was the case (nor does it indicate duration). I thought about trying to re-upload it and submit it again, but I understand this may be considered "spamming". Any advice?

Thanks!