Chili dog tater tot casserole

INGREDIENTS

8 hotdogs, cut into 1/2 inch slices
2 (15 oz) cans chili (with beans)
3/4 cup ketchup
1 teaspoon Worcestershire sauce
1/2 onion, finely chopped
1/4 teaspoon crushed red pepper flakes
1 1/2 cups shredded cheddar cheese, divided
1/2 cup mozzarella cheese, divided
1 (28 oz) bag frozen tater tots
Salt & pepper to taste