1. Mr_Smiley_ 2. Sepsis 3. Hacking (Sepsis is the one who is invisible and he is using a diamond axe (no enchants) you can see that it is him because he killed someone (look in the chat at 0:50) and he is using Skull Splitter (see in chat at 1:00) 4.
Thank you for the report. The reported player has been banned. This thread has been moved to Reports - Banned.