After uploading a video to YouTube yesterday, I noticed that it wasn't well optimized. So, I renamed the file, re-uploaded it to YouTube using different title and description but the upload wasn't successful. It was rejected as duplicate.
Fortunately, I was able to reupload the video to YouTube successfully after implementing the tips shared in an article at YouTube Help.
So, if you'd like to upload the same video again, note that simply changing the file name won't prevent the rejection message from showing. Instead, please try editing the video again.
For example, changing the video length (e.g. by adding extra frames by using video editing software) or compression should allow the video to upload.
I used Windows Movie Maker to add credits to the video, which increased the length of the video from 7:12 to 7:16 as seen in the screenshot below:
After uploading the optimized video, I deleted the previous one.
I hope this helps.