This  file is specific to  videoalpha.
We have no folder structure in tests. 
We have now 3 videoalpha test files in xmodule/tests.
So you proposing to create videoalpha folder and move these test files there?
I would like not do it in this PR (because there are 2 more PR on videoalpha), but i can create another PR on that. What you think?

And i don't understand  what you mean by tabs/metadata-edit-tab.html regarding test_videoalpha.py, may be typo?