Alright, so I'll help you out. Here has been Spawn Wave's streak, then. To point out, he also knew about all of Nintendo's fall-line up in various multiple videos, but I can't for the life of me find one with his daily uploads, but here's a few highlights.
December 17th, 2017 - He put out a video marking out the rumors of Atlus' Catherine series making a return. Turns out, that was real with Catherine: Full Body.
https://youtu.be/PilH68rDHCY
June 28th, 2018 - He put out a video marking out the rumors of Google dipping their toes into the gaming industry and cloud-based technology. That ended up being true MONTHS later with Project Steam, a prospect where you can play games like Assassin's Creed Odyssey on your Google Chrome browser.
https://youtu.be/YB3WQLTDHcg
August 16th, 2018 - He put out a video marking out the rise of all the rumors about a port of New Super Mario Bros. U. The thing is, he knew about all of this before people like Liam Robertson did. Turns out, that was real with New Super Mario Bros. U Deluxe.
https://youtu.be/mq9pLaLIZbQ
August 23rd / 24th, 2018 - He put out back to back videos marking out the Smash Ultimate Switch Bundle being leaked out on a French website. Of course, this was confirmed in this year's September Direct. Then, another video pointing out the rumors of Xbox selling their customers Xbox Ones like how you contract your phones. That ended up being real, too.
https://youtu.be/dFhdRljGwD0
https://youtu.be/Scdjx-a_esE
September 3rd, 2018 - He put out a video marking out the rumors of an early Nintendo Direct in September. This was very much confirmed during one of his SpawnCast broadcasts when someone hinted at it, and turns out, that ended up being real.
https://youtu.be/YP4ku2f4qVg
With having a really good credibility status, was this any help at all? Because you can't ignore all the evidence because "it's a YouTuber".