If you already have a save file that has enough starbits that you would like to keep instead of downloading a new one, you can simply copy the save onto the SD card, then do the process described above. This is a good strategy if you want to keep your IL times. Just remember to update the file periodically, because you might accidentally revert to an outdated save.
I know this sounds very silly, but I get anxious very easily and got scared of verifying runs lol. You asking though has reminded me and I'll just do it. The one thing I have to ask though was about your green stars time. Was it just an estimate because of the credits? If that's the only category where that's an issue I can accept the others but it won't be possible for that one.
What are you supposed to be using this footage for? It mainly just seems like you're ordering people around.
It does, the leaderboards are just not hosted on this website. The closest thing to a leaderboard can be found here: https://cyberscore.me.uk/game/627. However, due there not being that much competition, we mainly just care about who has the best times, which can be found here: https://kb.speeddemosarchive.com/Super_Mario_Galaxy_2/Star_Times. Hope I could be of help. :D
Have you seen this video? If you have not, this should help, but if you still can't get or you've already seen it, I can try to help.