It begins with video clips of Clinton contradicting himself on how long it will take to balance the budget.
A video clip shows Clinton contradicting himself on how long it will take to balance the budget, which means he may contradict himself on other issues. 
mnli hypothesis: A video clip shows Clinton contradicting himself on how long it will take to balance the budget, which means he may contradict himself on other issues.  premise: It begins with video clips of Clinton contradicting himself on how long it will take to balance the budget.