Walaikum Assalam,
JazakAllah for liking this forum and for posting suggestions. We are planing to upgrade looks and other areas of forum so InshAllah you will see the changes soon.
1) Sorry we dont have any such functionality as Islamic Calender for now. I am planning to create a separate website specifically for this feature so InshAllah you will hear some good news in future.
2 & 3 ) I have discussed your suggestion with Sis Ummitaalib so lets see what happens.
4) By halaal video do you mean video without any picture of human etc? I did had a discussion with our admins he