What is it?
The object that's entering the atmosphere and breaking up as it does so is not a meteor -- it's much, much too slow for an object in solar orbit -- but rather some human-generated debris falling back down from low earth orbit. It's believed to be the discarded remains of a Russian Soyuz rocket that launched from Plesetsk earlier that day (Monday, August 7th, 2023), according to the Australian Space Agency. They were launching a new GPS satellite.
As far as the "crossing trails", I think you're simply mistaken about what you're seeing. In the first clip, there's a power line and a tree that the fireball passes behind, which are both lit from the ground (you can tell it's a power line because it has a slight helical pattern to it, and right before the cut there's a second one that enters the frame in the lower left). There is no second meteor trail crossing the first one, it's just ground-based objects between the camera and the sky.
The whole thing is certainly impressive and slow enough to "look fake" at first viewing, but there are enough films and reports of it from around Melbourne that we can be confident that it really happened.
Basic research for "is this real?"
You can't be 100% sure of any single video or photo, but if something amazing is happening in a highly visible place (like the sky or in a city), there ought to be dozens of different people who are all reporting or posting photos of it from different positions, which is a good indication that it was, at least, a real phenomenon (though the common explanation of what they're seeing might be wildly mistaken). When the video helpfully specifies when and where it was taken, as this video does, that gives you a great way to check on it by just doing a web search. For example, in this case a search for "Melbourne Australia meteor August 2023" picks up dozens of news stories about it, most of which quote the Australian Space Agency's explanation of what the object was.
This works for other possibly fake videos, too -- if there's some amazing thing installed on a street somewhere, we would expect to see many people recording it and posting about it, and news outlets discussing it. If there's only one video by one guy on Tiktok, it's probably not a real thing.