 Mario Kart Live Home Circuit isn't the kind of thing that we would normally cover in a dedicated video on Linus Tech Tips, but as one of the coolest applications of augmented reality that I have seen, well, ever. It merited us giving it a try even if it cost us almost $2,000 in equipment and pushing it to its limits. As you can see, under normal circumstances, you can race with up to four carts. That is assuming that you have four switches and perhaps the most difficult part, four friends, with money. But as we're about to see, under more challenging circumstances, it doesn't necessarily pan out like this. The insane course that you're looking at here is not only enormous, but we worked around Nintendo's multi-level limitation and we're gonna have some incredible stakes. The winner is going to end up with extra vacation time for the year of 2020. That's right. One good thing is finally coming out of this godforsaken year. Like my segue to our sponsor, Ridge Wallet wants to redefine the wallet with its compact frame and RFID blocking plates. Check out how they can keep your wallet bulge down and use our offer code Linus to save 10% at the link in the video description. This is so cool. I love this course. There's like, there's obstacles. LTTstore.com. It's got everything. You've got all these different surfaces that we're gonna drive over, like smooth, reflective ones, crunchy ones, metal ones, we're gonna go over grapes. It was challenging to get it up to this level though because the game actually doesn't recognize multi-level courses and the cars aren't actually very powerful because the cars have to go up really gradual incline or else they just get stuck and roll back down. And one more fun challenge, recording the gameplay for you guys to enjoy. Now normally the Nintendo Switch supports natively recording your gameplay onto the device itself. But whether it's because the camera is running or the processing is too intensive or whatever the reason is, Nintendo doesn't allow you to record gameplay while Mario Kart Live home circuit is running. So we had to set up external recording devices and of course webcams get them face reactions for each one of our four switches. There's no limit to how big of a course you can make except for the distance between all the multiplayer switches because there's one host switch and all the other switches need to be near it and distance from each person switch to the car. We needed the switches to all be in range no matter where in the room the cars went. The thing to remember guys is even under ideal conditions Wi-Fi particularly low latency video streaming over Wi-Fi is challenging and as soon as you've got a combination of multiple wireless devices all streaming video at the same time along with additional peripherals like wireless controllers you are basically creating a hot ugly soup of wireless signals bouncing all over the place. All in all this cost us I don't know somewhere between two and three grand worth of hardware plus the recording setups plus all the time to set it up so I really hope you guys enjoy it because I might be out more money by the end of it. Mapping out your course is actually really easy. All you do is set it up and then drive the car where you want the course to be kind of painting on the ground. You set your gates up in order and drive through them into the one thing to be aware of is drops. The wheels need to stay in contact with the ground so in the case like over here we actually put some tape on the on the course to make it more of a steep hill than a drop-off. I'm ready to race boys! I'm just gonna follow at a safe distance here so I can go around all the people. Oh no! No, no! I was in first! My controls are not working. Oh man. Come on, come on. You can do it buddy. What? Why are you going backwards? Did someone just bump me and move me up the ramp? Yes. Nice. I'm telling you to do the opposite. There we go. There we go. Oh, come on Luigi. I gotta... Oh, there's items. I want me them items. Oh no, I didn't get that. Oh get out of the way Anthony! Hello? Move it! Move it! What is this? I can't move! I know, just stop. Stop for a second. Who's Luigi? Stop. Oh my gosh. I think I'm f***ed. No, I'm good. I'm good. I'm stuck. I think. I think. Wait, someone's done a lap already? Yeah! Linus, get the f*** out of my way! Get out! You get out of my way! You jerk! Oh my accelerator! Oh! No! What? What happened? Oh, I cannot control this. I cannot control this. Oh. No! Hey! I need help. I'm stuck. Oh wait, what do I do? No, I'm okay. I'm okay. I'm okay. What just happened to me? I'm okay. I am not gonna fall. Yeah, baby! I'm gonna pass. Get out of my way! Get out of my way. God. Oh, if Linus hadn't done that, I'd set up the drift perfectly. If Linus hadn't done what? Race properly? Oh, I guess. Oh my god. I'm stuck on the ramp! It's so laggy. I am not gonna fall. Yeah, baby! You could say I'm a Mario... Oh, I'm stuck! I'm stuck. Yeah, Riley's a low priority. What the heck? Oh, yes, yes, yes, yes. It's fine. I didn't need you. Who just... Did someone just hit me? Hello? Move it, Mario! You're Mario! Okay, okay, wait. I'm under the ramp. No! Come on. Wow, is this actually seven laps? I can't. No! I'm stuck! No! Anthony, get the hell out of my way! Back up! You're in my way! No, you're in my way! Anthony, move! You don't even need to pass me! Go! Yes! Anthony doesn't deserve our sympathy. There's a lot of crazy stuff in this course, but that one corner... Oh, god. I haven't been able to get through it without reversing once. Your feed is so much better than mine. Look at mine. What are you talking about? It's not going! I can't... Okay, hold on. I'm going to use your feed to drive my car here. Can I use the track? You know, I'd just like to thank the mushroom, the toadstool brothers, and for this wonderful occasion. Hey, it's okay. I can give you guys lessons at any time. Oh, my god. The key is... You need a second winner! I would love to be, but I'm stuck on this for some reason. Oh, god. What is this? Out of my way! Oh, my god! Sarah! Move! Okay, it's kind of working right now. Or not. That's thousands of dollars well spent. What a gaming experience. I don't mind losing, honestly. But I don't like losing because my equipment's malfunctioning. I want to try other people's cars to see if it was significantly worse. Oh, my god. How did you not win by more? Yeah, true. I think I won by like two laps. This actually works! Oh, this is really bad. Oh, my god. Riley's is so much better. Tell you what, Sarah, consolation prize. You can have a day two. Because this is clearly not fair. This is so stupid. Well, that was a total cluster. But what went wrong? Our Flowplain viewers, who have had this video for over a week now, had some suggestions. Some of them, I'm not sure if I buy. We had people saying they think it's because of our incline. But, honestly, testing worked just fine before everybody showed up and actually tried to race. And we had others suggesting that wiring up the switches for networking would fix it. Now, that's a good idea. And that's one of the things that I thought of at first. Except that our main problem was really the video feed between the switch and the cart, which is going to be wireless regardless of how the switch itself connects to the internet for updates or whatever. So, realistically, what I think went wrong is a combination of factors. One, there is a ton of RF traffic going on in here. Everything from our studio lights to our microphones to, obviously, all the Wi-Fi devices in this office is running over the air. And we have had weird problems, like microphones going, suddenly or stuff like that. The other one, which I actually think is the bigger one, is that we had no control over which frequency our Wi-Fi was running on. So, if it was on 2.4, I mean, oh my goodness, anything, even a microwave could have interfered with the signal. And, whether you're running 2.4 or 5 GHz, large bodies of water can have disastrous effects on wireless connectivity. So, even in our better scenario, when we ran it upstairs and did manage to have a successful race after the fact, in fact, you can see I'm still connected to that one here, some of our racers who were just 3 or 4 meters away from me experienced some issues with their video feeds when their carts were just driving around me, lying there on the floor. So, in conclusion, when it works and works well, it is a ton of fun, but if you push it to its limits, I wouldn't be surprised if you run into some problems. The good news is most people probably won't do that, because it's like, too grand in equipment to run four racers. Just like it's expensive to sponsor Linus Tech Tips, FreshBooks is the small business accounting solution that's built for owners. It's designed to be simple and intuitive, so you can spend less time on paperwork and more time running your business, and you can automate all kinds of tasks, like invoicing, organizing expenses, tracking time, and following up. 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