Fix upload_video "private method 'open' called for an instance of URI::Generic" error

[mrj]

Calling Account#upload_video on master with a file path string (no file:// URI scheme), I get a private method 'open' called for an instance of URI::Generic error that wasn't fixed by #438.

This PR changes

file = URI.parse(path_or_url).open

to

file = URI.open(path_or_url)

open automatically parses first when its argument is a string-with-scheme, and defers to Kernel#open for paths.

I'm testing on Ruby 3.4.5. But looking at the history of open-uri.rb, this call to open should work on even ancient Ruby versions.

[kangkyu]

According to your comment above, we need basically revert 746a1b3

I don't exactly remember but "open-uri" has been changed a bit. Your change works for any version of Ruby? @mrj

[mrj]

The require 'open-uri' in 746a1b3 is definitely needed. But I wasn't aware that it also made the two changes from open to parse + open. These additional changes do break path URLs for me. I'll ask the committer about their motivation for those changes.

[kangkyu]

Thank you @mrj let me know if there's anything you want to add or change. I am going to merge if you are ok

[mrj]

Thanks Kang-Kyu. This PR only fixes upload_video not upload_thumbnall. I'll add that first.

[mrj]

Thanks for committing this. In #449 I've done the same with upload_thumbnail.