In a crock pot add all ingredients EXCEPT vinegar, refried beans, tortillas, taco sauce, and cheddar.
Cook on low 6-8 hours.
Add vinegar and shred chicken with forks (I find a potato masher works well too).
In two 9x13 baking dishes spread half of the taco sauce and spread evenly.
Assemble burritos by smearing a tortilla down the middle with refried beans. Add approximately 1/2 cup of the chicken mixture, roll up and place seam-down in baking dish. Repeat until baking dish is full (usually 5 burritos in each dish for me).
Pour remaining taco sauce over burritos, sprinkle with cheddar cheese.
Bake at 350 for 10 minutes, or until cheese melts.
I love making a double batch of this and save the "guts" in a ziploc in the freezer for another day.