I am having problems with Adobe Stock with some clips where the automatic thumbnail Adobe creates is totally misleading. For example if I make a slide shot from white background to the subject the thumbnail is white......how is a buyer be interested in such a file?. Adobe is the only footage agency where it is impossible to change the thumbnail/poster frame. I try to do this with Stock submitter and Davinci resolve but even so many times Adobe Stock just picks up the first frame. It is really frustrating. Someone with a solution for this issue.Thank you

 

many stock sites will make the thumbnail from the frame at 1 sec (30th frame). some might use the first frame, which is less accurate.

in theory, if a stock agency has a minimum 5 sec requirement for video length, it makes sense that the frame at 2.5 seconds would be a good frame for the thumbnail since it is the midpoint in the action. this would solve your problem.

perhaps you could contact adobe and ask them which frame they pick and suggest they use a different frame.