Molt_YouTube is making a new statement about "cheating" in the game.
In his latest video he was playing against a guy who he was easily beating. Took the guy's first tower down no problem and it looked like it was gonna be an easy victory for Molt.
Then we see a dramatic turnaround when the opponent wins the match as if he seemingly knew what cards Molt had and how much elixir Molt had.
During the match we see that up to 6 people are spectating the game. These people aren't Molt's friends list, he presumes they are on his opponents friends list. These people are then able to see Molt's cards & elixir and then relay that info to the opponent. Either the viewers are in the same room as the opponent so the opponent can see their screens or the info is being relayed by FaceTime, Skype etc on other devices.