I am planing to upload 10k photos and 20k videos to Dreamstime

Is it worth doing it?

Simple answer. No.

Here are my numbers of the last 3 years - maybe this helps:

-> Shutterstock: 27.92%
-> AdobeStock:  24.39%
-> IStock: 16.04%
-> Dreamstime: 8.17%
-> WireStock: 5.46%
-> Pond5: 5.19%
The remaining 12.86% are shared between: Alamy, DepositPhotos, 123rf, BigStock, MostPhotos, EyeEM, IndivStock, OhnMyPrints, DesignBundles, YayImages

I have a portfolio of about 25.000 images and 1.500 videos and never sold a single video at Dreamstime, but photos do sell - most for $0.38, some for $2.20 and rarely sales between $10 and $20.

As a test, I uploaded 500 videos about a year ago. Sold 2 videos only = 22$. Depressive 

If you are embedding your metadata directly in your photos or a using some kind of micros stock submitting service and it's just a matter of uploading the photos and clicking "submit", Dreamstime might be worth the little bit of extra money as it means no real additional work. Otherwise it might not be worth the effort. I make on Dreamstime in a year what I make with some other agencies in a month. But if it means no additional work, it's still nice "pocket money" once in a while. Just don't expect any big money from them.

embedding info to metadata won't work for videos, interestingly only adobe recognize that, but not others

Ah, I did not know that, I only upload photos. I guess then it's probably not really worth the effort.

Dreams actually not worth for photos as well but if you are going for non-exclusive, you can try. However, consider that you have to choose categories one by one. Yes they have so-called an ai to make it for you but it mostly chooses wrong ones so it takes time. Depositphotos, on the other hand, makes this process very easier. You just click to send (of course not for the videos). Pond5 is also relatively easy compared to Dreams, however they limit the titles. Still you can make multiple edits for choosing types or other features etc once, then send. Nevertheless, you won't sell there much believe me. Once you do, you would be very happy because of the prices however it won't continue unfortunately. Your choice.

Quote from: falantus on July 29, 2021, 07:44

embedding info to metadata won't work for videos, interestingly only adobe recognize that, but not others

I am using Adobe Bridge to embed metadata to videos...
... which works for: AdobeStock, Dreamstime, IStock, Ponds
... and does not work for: DepositPhotos, Shutterstock

... or use StockSubmitter, which keeps the meta in a thumbnail associated with the video. It works on all sites. 

Decent site. I make a good second tier amount there.