As video game leaks go, it's one of the strangest we've ever seen.The below video, posted to YouTube by one Skid Kid, shows plenty of Halo 4 multiplayer gameplay. The only problem is, Skid Kid filmed off of what looks like a 20-year-old standard definition telly, playing a VHS, in a barn. Really.Also, the music isn't safe for work, or your ears. We advise you turn your speakers down, or, preferably, off.While the video is of terrible quality, it does divulge some new gameplay details. It looks like it shows a Slayer match on the Warehouse map, and reveals a faster pace of movement and weapon switching than in previous Halo games.Halo 4's Sprint ability, which developer 343 Industries has confirmed is attached to Spartans by default, looks like it lasts a lot longer than Sprint did in Halo: Reach.We get a feel for the new instant respawning. In past Halo games, you'd have to wait for a countdown to expire before respawning. We also get a glimpse at the Railgun weapon, sword work, new assassination animations, Personal Ordinance and the Promethean Vision armour ability, which allows players to see through walls.Microsoft's statement on the video leak is as follows: "We are conducting an internal beta test of Halo 4 which is a standard development practice for most video games. We have no plans for a public multiplayer beta for Halo 4."Expect more on Halo 4 during Microsoft's E3 press conference next week.