First of all, get a decent tool for capturing your findings. I recommend this one:
https://drive.google.com/file/d/0B_x__uIHJMFxZ3huUnB4RGU3UzQ/view?pli=1
It has a nice "download all from this channel" feature that many others lack. Once you're done, you'll be ready to go.
WHERE TO GO
Pay special attention to low-level streamers (above level 5 usually). The people you are looking for have downloaded the app just a few days ago and won't stay around for very long. Also, keep an eye on the amount of fans they have, a level 2 with more than 100 fans is someone worth checking. Some good starting points are the "Recently Joined" page (https://www.younow.com/recentlyjoined.php), the non-trending tags (you can find them by using the search bar, just type in each letter of the alphabet and each number), and the bottom portion of the queues. Eventually you may find some users who specializes in fanning winning streamers. Once you find one, finding more will be easier.
WHAT TO DO IF YOU FIND A WIN
Start recording. Actually, you should always be recording, you never know what's going to happen next. If nothing happens, you can discard the video later. Keep in mind that if a streamer gets banned while broadcasting, the whole channel will be deleted altogether, including all archived videos. And that's exactly why the second thing you must do is to download all of the streamer's archived videos. If a win is happening now, it's very likely it happened before. Anyways, make sure to examine the videos only after they are already on your computer. A cool thing I noticed, by the way, is that even if the streamer is banned while you're downloading their videos, your downloads still won't be interrupted. Now, the next step is to check the streamer's social media. Look for their real names or any usernames they like using. If youPost too long. Click here to view the full text.