How can I select all cells in table view in swift language

Question

I'm trying to load all cells in table view but I can't. I have received an error. Did you have any solution to fix this issue?

This is my code :

func selectAllowCellInTableView(tableView:UITableView){
        for j in 0..<tableView.numberOfSections{
            for i in 0..<tableView.numberOfRows(inSection: j){

                let indexPath = NSIndexPath(row: i, section: j)
                let cell = tableView.cellForRow(at: indexPath as IndexPath) as! VideoTableViewCell
                cell.imageViewCheck.isHidden = false
            }
        }
    }