When i'm uploading a speedrun, Is the "Time" the video time or the speedrun time, and if it's the speedrun time, then what is "game time"?

All times are the length of your run, how long you streamed for is irrelevant (although the video time should only include the run you're submitting so it should be close to the run time).

While I don't know what game you're talking about, I can only assume that by "Game Time" you mean "In Game Time"? IGT refers to the time the game provides at the completion of the run. This is usually used when the game itself provides a time for how long the run took - it'll usually show it at the end of the run or when the completion screen is shown. If you tell us what game you're trying to submit a run to, we can try to help you further. But ideally, and questions you have regarding submissions to an LB, you should post those in the forum for the game. The community for the game and the moderators of the LB in question can help you much better and more accurately than the users of this general forum can.

Game Time (in most games) refers to time passed inside the game, For example; If you close out the game to do a load glitch and the game takes time to load back up, Real Time would count all time, including the time that passed when the game was closed. In game time would only count time that the game was open or you were playing, I Hope this helped.