original_file_name can be expressed much more clearly with xpath, and we get to delete a lot of code. One behavior change in video_spec.
I can not find anything that was using these.
Calls #to_s on return val of Transcript#original_file_name to avoid 'no implicit conversion from nil into String' errors when ingesting transcripts with the TranscriptIngester. Transcript#original_file_name may still return nil, which could raise a 'No such file or directory' error, but that is fine, since it is more informative.
Merge pull request #1098 from afred/handle-no-media-1079

original_file_name can be expressed much more clearly with xpath,