What's your hack for replaying the same 30 seconds of a YouTube video over and over?

Asking because I'm building a Chrome extension for this exact thing — looping segments of YouTube videos. But I want to know how others currently deal with it.

Do you:

- Manually scrub the timeline back every time?

- Open the video in 5 tabs?

- Use a third-party looper?

- Just suffer?

Curious what tricks people have figured out. Especially for stuff like music practice, language learning, or rewatching tutorials.

(For context — I'm launching Repeatly on May 6 to solve this for myself)