Tenerife's confirmation on Tuesday morning was the first public word from the second-division side that De Miguel had died.
The gathering brought together speeches by club directors and a religious service, as the club marked the loss of a player friends knew as Demi.
He told the gathering it was still hard to believe that this had happened to them, and that Demi would always be one of them.
The chant followed the images of his first appearance for the club, linking the formal tribute to the stands.
Matches across Spain's divisions over the weekend observed a minute's silence in De Miguel's honour.
Team captain Enric Gallego spoke for the squad, pausing repeatedly during his address.
"We're still struggling to come to terms with the fact that you won't be with us again,"Gallego added."To speak of you in the past tense is tremendously unfair,"Gallego said.