In the national flag graphic for the opening and closing titles, by elimination the bottom left corner flag must be that of Belgium. However the right hand stripe is dark green instead of red.
At the beginning and end, the flags of the participating nations paper the screen. One flag shown is the Union Flag of the United Kingdom. However, there is no United Kingdom (or Great Britain) national football team. The team that qualified for the 1970 World Cup was England, whose flag is the Cross of St. George.