In case that did not make sense, I mean if i streamed on twitch and I submit the video of the whole stream with a time stamp.

No, that is not a good idea.

Past Broadcasts are deleted the moment you end them on Twitch. If you enable the setting to save all past broadcasts, they are still deleted, but after 14 days. Any run submitted with a broadcast will be auto-deleted after 14 days. You need to make a highlight of the run from the broadcast and submit that instead. It is also recommended that you only include the portion of the video that is relevant (so only include the run and any additional information required by the game's rules).