With the current version of video center, our newsroom and video team can upload thumbnails directly from their computer. The request is keep that option within the new interface. With the new UI, the only available options seems to be to pull the thumbnail from the video or upload an image to photo center which adds extra steps.
Hi Briana,
In the current (new) experience, when you click 'Search in Photo Center', a Photo Center modal opens where you can click the blue 'Upload Image' button and upload directly from your computer. This experience is the same between both the current and old version. Hope this helps!