No, you may not legally get the content elsewhere: that is a violation of copyright law. When I create content that I want money for, I negotiate with a distributor such as TW, and I grant TW a license to make my stuff available. The license can have all sorts of terms in it, for example conditions on where and when it can be distributed, and how much TW must pay me per user. Such content usually has some requirement of keeping track of how many viewers there are. TW gets permission to copy my stuff in exchange for something valuable – we have a contract.
I have no contract with you. You have a contract with TW. Your contract with TW may allow you to watch the stuff once, or any number of times between certain times. TW cannot grant you the right to watch stuff that some other party also happens to make available (be it legally or illegally). Your right to watch at the scheduled time depends on a chain of rightful permissions, where TW can legally distribute because of their contract with me, and you can legally watch
on TW because of your contract with them. The pirate source has no legal right to my stuff, so you cannot gain a legal right to my stuff from them.
Also FYI in the US there is no legal defense "I didn't know that the pirate source was distributing illegally" (known as "innocent infringement").