Upload or uploading?

Question

"At the time of this video's upload"

Is the "Upload" functioning as a noun adjective?

Also why is it written upload and not uploading, becuase in the sentence ("at the time of this writing") it's "writing" and not "write".

Answer 1

It's the noun upload, meaning 2

TFD

n. 1. A file that is uploaded. 2. An instance of uploading data or a program.

There is no noun write.

Answer 2

'Upload' is to do. 'Uploaded', done. 'Uploading' is being done. They can't be interchanged. Each word has a different meaning.

And uploading is what you are doing. It isn't which you have done before. writing is a word of noun, because it has been written(the text)