The countdown is on for the 2026 FIFA World Cup, jointly hosted for the first time by the US, Canada and Mexico. But a viral training video has triggered doubts about whether the US stadiums are ready for the tournament, after Senegal's national team was seen practicing on a pitch that saw the ball barely bounce. Fans online said it would result in "player injuries" and the "worst World Cup ever", but there's key context missing about the stadium and pitch.