nyctrman, is the A train in your video supposed to be an R44 or an R46? Because I see a combination of both and so...I'm entirely clueless~ 
That's a beta-version of the new R44 by zerobeats2000 
actually it isnt thats a 46 but i repainted to a 44 thats the R46 Beta i just had to change the front and side to make it a R44
Oh, I should have known those were R46-exclusive sounds

Its just that the real R44 looks almost exactly like that