I think the brains behind this project are trying to be realistic with the time line of the milestones in their road map but it's seems the current set of investors in the crypto space may not be that very patient unless the team gets a way to hold the community of supported together with constant updates, something new, every now and then. Because there are lots of ICOs out there competing for attention.

yeah pretty much so. if they update every now and then it will be fine

i'm sure that would help a lot to increase the sales. Investors always like to see something more that just documents about what they want to do.

Video combined with other types of stuffs like text or images will be better to try to give a better understanding. In other word, ehf should use as many ways as possible to attract more people.

They have some experience with short videos so this might be possible for them to do. A bi-weekly video diary if you will. 

They published quite some videos about the project already, so I don't know if there are still topics they didn't cover.

i'm sure that would help a lot to increase the sales. Investors always like to see something more that just documents about what they want to do.