Legacy uploader is NOT working properly now (from Mar 16).
However, by performing an certain operation, we can upload videos successfully with the legacy uploader.
The symptom of the problem is that the coordinates at the beginning of the gpx file are used even though the time adjustment operation have been completely performed.
So, for each video I want to upload, I made a gpx file of only the time zone of that video and gave it at upload.
And with that operation, the legacy uploader can create the correct “Street-Level Imagery”.
I have described this symptom and how to handle it as follows :
Perhaps the legacy uploader can not be improved in the future.
However, it is so powerful and easy to use that I hope it will be used as it is into the future.
I am using a free app to edit gpx files.
There are many editing software. I do not describe the details because I don’t have time, but I think that I will explain how I am doing if there are many who need it.