Hi Pajulapoiss, that is great news! And some very good questions. Thank you for asking them.

It is 100 EGC per video. If you make 5 different videos of 5 different tree plantings, yes you can be paid 500 EGC total. I do kindly ask you to make sure the videos are easily distinguishable as different. Perhaps different angles / backgrounds / tools / people / ect. and different steps in the time lapses you are creating. Multiple, of what appear to be, copies of the same video / event will be of little if any use. In that event, only the best will be selected and paid for.
 
I do ask you to use a physical logo. This can be as simple as printing one out or even having the logo on your phone and held visible in the picture, if your phone is not the camera you will be using. So long as it is easily viewable and legible. If we allow for edited-in logos, someone might try falsifying a submission, so I think it's best we not allow for that.

Looking very much forward to seeing the time lapses, Pajulapoiss!

Thanks again for asking for the clarification first!