Video: JP appends "_hd" to Video URL in Media Library

#### To Repro

1. Download a 1080p video like this one: http://mirrors.standaloneinstaller.com/video-sample/jellyfish-25-mbps-hd-hevc.mp4
2. Note the video resolution is 1920x1080.
3. Have a test site with JP connected and video hosting enabled (needs Premium or Business plan).
4. Upload the video. We will process it...
5. Once done processing, open up the attachment editing modal.
6. Note how `videos.files.wordpress.com` URL has appended `_hd` to the filename: https://d.pr/i/EVgWug/ncVp8KOGZ7 This default URL shows the video at lower resolution than we have available.

#### What I expected

That the generic URL to the video be the URL to the original, not a downsized copy.

#### What happened instead

Downsized URL was used.

Came up in 1683169-zen and I can repro on a test site.

Start at the Media Library attachment editing modal and trace how the videos.files.wordpress.com URL is selected after processing a 1080p upload. Compare the generic URL with the `_hd` URL using a test site with JP connected and video hosting enabled. Done means the generic video URL points to the original available resolution rather than the downsized copy.

Written by the indexing model from the issue text.