I wanna do this solo and co-op. But I wanna know when I start my time at? I stream on mixer from Xbox one so how do I do my time from the in game time.

If you're doing co-op, time starts when both players hit "ready" on the first inventory screen. At least that's something the rules used to specify, and the way we've been doing it for years. If you want to snake a few seconds, I guess you could start when you gain control of your character because people have been doing that recently.

the only time that really matters is the in-game time, and the game shows this at the end of every chapter. if youu submit your run with only a real game time it will be put in last place (or close to it if other runs have been submitted with only a real game time and they're worse than what your submitting) on the leaderboards. i dont have a real game time next to any of my runs. if you really want a real game time next to your submitted run and you dont have a way to use splits do what Jake said after you finish a run. when both players press ready would be a better place to start your real game time. i feel its more legit because real game time is suppose to facter in loads and starting the time when both player gain control would cheat out a little loading