Lately I’ve been collecting flashcards that have been generated with subs2srs, which takes a video and a subtitle file and makes a flashcard for you from each line, with the text, audio, and a screenshot at the corresponding time. Right now I have 171k cards in my collection (don’t worry, I’m only studying a small fraction of those), and it’s super helpful for when I want to look up sentences. To use your example, this is one of 56 cards that I found when I searched for そんなことない:
The way I have it set up, the front of the card has the screenshot and the audio, and the back has the text. You could set it up however you want of course. If you don’t want to study every line from a given show, you could simply selectively add cards as you need to – basically search in the browser for the word or phrase you want and manually add it to the new card queue.
I’ve gotten a lot of my decks from this shared folder (and contributed a couple myself recently). Happy to answer questions if you have any! I’ve been doing this for about two months and it’s incredibly helpful on a so many levels.