Contents of the OP copied from gaf as I do agree with that OP and being properly credited.

Summary:

1. Gets into a pissing match with Rare

--How he got into an ego conflict with Rare over Donkey Kong, staled Dinosaur Planet development and more.

2. Cancels Star Fox 2, then steals its code and assets for other games

--Canned SF2 and used its code for SF64 without attribution or royalties to Argonaut.

3. Steals the concept of Super Mario 64

--Argonaut were developing a Yoshi game, they got let go and they used the code for Croc, to be the first 3D platformer, and Miyamoto harnessed their ideas and SF2/Yoshi code and got to market first, then said "too bad" to Argonaut and denied them royalties.

4. Bankrupts the developers of GTA 3

--Body Harvest was being developed by DMA Design, but Miyamoto created a lot of hurdles for the development, causing many delays. Eventually this lead to them going bankrupt, and being acquired by Take Two and merged into Rockstar. These are the people who created GTA 1-2, and their remnants developed GTA3.

Source Video: https://youtu.be/v9GpCCZ6NAE

Source: http://m.neogaf.com/showthread.php?t=1328992

After watching the video Miyamotto looks less like a legend and more like a thug.

So you know all of those points were already debunked on Gaf :o

Hard to steal code to a game you own as well (Star Fox 2)

Really? Please link. 

Who's Larry Bundy Jr?

Still not as bad as that thread I read last night...

And who's Larry Jr.?

I would if I had the time to go back and look through the thread at the moment, but if you don't mind doing a bit of reading, just read through the pages of the thread and people have posted links that either disprove these claims or at the very least leave them as dubious and not confirmed: http://gamrconnect.vgchartz.com/thread.php?id=224020

Some of those might be valid, but the bit about Mario 64 being 'stolen' is silly.

From the moment Project: Reality was announced in (fall 1993) as a 3D game machine, a 3D Super Mario game was always a given.

I'd ask larry the same in his video tbh. All I ehard was "X person said this" without actual citations to all sources.

I wondered when the video itself was going to show up on here, though I was expecting a different OP to post it, but this one fits the bill none the less. 

That is how news works in 2016, you don't need sources, you can literally lie on facebook and it will be treated as news. 

Which is pretty much what happened with another thread when it came to Phil Spcner and Twitter , though that thread got locked shortly after it was created. I don't really see this one serving a higher purpsoe either, other than for one group to rag on Miyo and another to rag on the group ragging on Miyo.