I use batch upload with csv to upload the metadata, but I add images manually, there is no way to add thumbnail for a video

[hafftka]

• What is your wallet address? 0x208833804D09Cf965023f2Bdb03d78E3056b4767

• A summary of the issue:
  I need to batch mint 99 1/1 items. I am uploading the metadata with batch upload using csv file but I am omitting the urls, because I want to upload the images manually after. I have no problem uploading jpg or mp4 when I select to edit the item, but when I upload mp4 I am unable to also upload a thumbnail.

• What are you trying to do? upload thumbnail in the edit item window when the 1/1 is an mp4.

• A screenshot of the issue/error with the console visibile.
  

  
  
  
  

• What browser are you using? Chrome

• What wallet are you using? Metamask