digital or not, I'm pretty sure the game is not converted and ported just yet, usually they do that when the game is done like a month before release. people need to do some research if this is their hobby.

This is 100% nonsense. Do you mean the game isn't signed to run on a retail console yet?If so, sure. Do you mean that Nintendo is using a 100% legimate retail console in this video? Because that is almost assuredly not the case. In fact I would not be surprised at all if all of the video shown in the ad is a playback of a pre-recorded video.

Nintendo could feasibily have made development/test kits by now that look almost identical to retail kits, and it would be very easy for Nintendo to make one look identical to one for the purposes of this ad. If this is a test kit in this ad, then it absolutely could run an unsigned version of this game.

That's not how it works. Running a game in debug mode on a dev kit vs running it in retail mode is literally a matter of a setting on the dev kit/deployment tool. Also, running a game in debug mode typically displays all kinds of debug information on the screen so you can see things like frame rate, and memory allocations in real time as the game does its thing in real time. We don't see that here. It normally doesn't run the game slower unless you specifically set it to run slower for debugging purposes. That's the main reason why dev kits are more powerful than retail kits - so the debug tools can be run on top of the game itself running at normal speed, using all of the resources it would be using as if it was running on retail hardware . There is no reason for this game to be running at 12 fps just because it's a pre-release build of the game.

This game is already in beta. It's at the polishing/finishing touches point. This game should be running at at 24-26 frames per second at minimum at this stage in development. Not 12 fps.

What the hell... Does that mean that Mario footage is not real?

This is 100% nonsense. Do you mean the game isn't signed to run on a retail console yet?If so, sure. Do you mean that Nintendo is using a 100% legimate retail console in this video? Because that is almost assuredly not the case. In fact I would not be surprised at all if all of the video shown in the ad is a playback of a pre-recorded video.

Nintendo could feasibily have made development/test kits by now that look almost identical to retail kits, and it would be very easy for Nintendo to make one look identical to one for the purposes of this ad. If this is a test kit in this ad, then it absolutely could run an unsigned version of this game.

What the hell... Does that mean that Mario footage is not real?

It is real, not only looks totaly real, there are strong rumours that suggest this trailer was released later than expected because Miyamoto didn't wanted to show new mario footage until it looked and worked flawless on the trailer.