There are no runs yet of Ni no Kuni for both the PS4 and Switch categories. 🙂
I don’t know about the equipment, but I can tell you that Twitch is the most popular site for streaming speedruns.
I don’t believe that they’re outright banned, but rather held to a higher level of scrutiny because many could be considered short/trivial.
You don’t need a capture card to record. You can just point a camera at the screen.
First hit on Google.
https://store.steampowered.com/app/370600/Hello_Kitty_and_Sanrio_Friends_Racing/
I’ve never had a problem getting a run verified just by pointing my phone camera at my 3DS.
Please read the first thread in this forum.
Roblox handles its games differently because they get so many submissions:
Make sure to read all the rules.
Welcome!
For your question, please direct that to the forum for the specific game you’re interested in. There aren’t site-wide rules for things like that.
Welcome! Have you decided yet what WR you’re going to go for?
2DS isn’t a platform on this site because it’s just a part of the 3DS family. For any game, you can run on 2DS and select 3DS.
The top menu bar is currently just a solid green rectangle on my mobile browser at the moment.