Hello @Yulia_Tikhanycheva
I just had a quick look on the System and can see that you have successfully registered so well done you. That is big step forward and I’m tagging @Laurent as he registered at the same time and had similar issues as you.
I saw that you added your star video to the album back on June 8 but I cannot see the details on the Leaderboard System. However, it is possible that you have experienced the same issue reported by both @palmad1 and @anon73568702 (see comments above). Unfortunately I will not know until I have had a chance to investigate this issue. So stay tuned in for an update.