Hi Stephane, Hope is all well
I tested the OnLine version you are available and many things do not work in this demontration (Adding video to MP4 format)
I think you clicked on "add cover image" to the video instead of upload a video button ... making adjustment to only display 1 button after upload video will display the second button.
Group management is very important to me (my project). These are not people that will be displayed in the first but groups. And I can not know if this is possible?
what you mean display in the first?
Do you also access a tag?
could you elaborate a bit more in this question ?... see at the moment we have mentions for users @name