Having issues uploading/importing a few WEBMs

Azure Fang
Fried Chicken - Attended an april fools event
Liberty Belle - Sings the song of the unchained

Oh no, he's here?
So, after >>2764697 (NSFW) was uploaded today, I noticed that two of artist:thecodsbarn’s past video sets, plus the first scene of a third set, weren’t present here. Unfortunately, I’m met with the following errors when trying to upload them, be it direct link, Marker’s Importer facilitated, or manually via download/reupload:  
Image can’t be blank
Image size can’t be blank
Image width can’t be blank
Image height can’t be blank
Image mime type (video/x-matroska) is invalid
Image duration can’t be blank
Image orig sha512 hash can’t be blank
 
I’m assuming it has to do with the mime-type being invalid/unreadable (or the source encoding being borked, which would explain the color flickering and why these specific WEBMs won’t load on my tablet which is sensitive to bad encodings), but that’s just my under-educated speculation.
 
The following links are affected (all NSFW, if that wasn’t already apparent):  
Hot Record  
https://derpibooru.org/images/1782755  
https://derpibooru.org/images/1782763  
https://derpibooru.org/images/1782797
 
Professor Zedwin’s Extra Class 2  
https://derpibooru.org/images/1685389  
https://derpibooru.org/images/1686768  
https://derpibooru.org/images/1686771  
https://derpibooru.org/images/1686775  
https://derpibooru.org/images/1686787
 
Yellow Zippy Night - Opening + Scene 1  
https://derpibooru.org/images/1611023
 
Any way to get these upped, am I missing something, or are they just dead without a re-encode?
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