video item not producing a valid manifest

[saracarl]

This items seems like it should be playable --there are derivatives in the right format for IIIF -- but our manifest doesn't seem to have any of them.

Item
downloadable derivatives
Item Manifest

It does have a bunch of Youtube attributes:

which we do surface in the manifest (and probably shouldn't??)

[saracarl]

Pretty sure this used to work, because I pulled it from another issue.

[saracarl]

We think this is because the original is this:

{
"name": "Polar_Plunge_Promo_-_2018.HD.mov",
"source": "original",
"mtime": "1520151264",
"size": "23070994",
"md5": "070f788d001ac4e469f0e4a2720df98f",
"crc32": "84c9b43f",
"sha1": "927670eded4d0fa096e119fecf6a9180b89b3f6d",
"format": "h.264 HD",
"length": "91.39",
"height": "720",
"width": "1280"
},

and we don't recognize/support "format": "h.264 HD",