Issue title: Library queues don't preserve raw file title
 Issue body: When queuing an item from a channels saved videos, and that item is a raw file that was given a custom title, that title is not used when queuing from the search interface.
 Comments: 
 Comment 0: This is because search queues secretly just re-fetch the metadata instead of reusing the saved result (the saved info is only used to display those search results).  Commit: https://github.com/calzoneman/sync/commit/c152a19624893beee0b0aa77b8676f0498027b44

I guess losing custom titles is an unfortunate side-effect of this.  It'd be a little subtle to make this work as expected: if the file actually [has the proper title tags embedded in it](https://github.com/calzoneman/sync/blob/3.0/src/ffmpeg.js#L335-L337), then I think the expected behavior would be to take the title from those tags, not the one from the saved library (including if they are different), the only reason to use the one from the library would be if the one in the library was overridden during queueing and the re-processing of the video yields no title.

I'm not really sure if it is worth it to fix this edge case when there are preferable alternatives to ensuring the title is represented correctly:

1. Using `ffmpeg -metadata title="A Cool Video"`, in which case CyTube will detect the title correctly for raw files
2. Using custom manifests, which ensure that any overrides/customizations to the metadata are explicitly modeled in a resource accessible via a single identifying URL.
{'source': 'GithubIssues', 'repo_name_with_owner': 'calzoneman/sync', 'issue_id': 1182565262, 'repo_stars': 1407.0}