I don't know how to export the model from blender
As you can see I deleted the parts where there were all the people on the sidelines... Then I get stuck there. I tried to export as if it were a face but it doesn't work, it remains unchanged.
It is kind of tricky indeed!
After you delete the object:
Click on "file", "export data", check "automatically pack into (...)";
Click on "file", "export data", "make all paths relative";
Click on "file", "save as" and save the file;
Click on "file", "revert" and confirm;
Click on "file", "export data", uncheck "automatically pack into (...)";
Click on "file", "export data", "make all paths absolute";
Only then you can export the files.
Do you know how to do it?