I have Rocksmith 2014, got it about a month ago. I have been playing bass for a while but was looking to see what it can offer plus a game to have fun with at the same time. I dig it.
I noticed in the beginning of the video you were jumping the gun and playing a note that was not really there. You did it twice within the same phrase. It was about a minute into the video. It also says you missed a note, during the slide. Either you did not hit the note at the right time or your slide was off.
It seems like a couple of things have gone astray.
Video: 1
1) First off, when you play a game like this, it is very distracting. You see all these notes coming at you and it is very easy to get caught up with it. Also, even using Riff Repeater, I'll nail something at 100% difficulty and tempo but within the context of the song, it is not perfect. I also find it difficult to play the song a few times and then repeat the song without the game playing (when playing a song that I have not attempted outside the game).
2) Your timing is a little off. This comes with practice.
3) You sound a little stiff in you playing. Relax and maybe keep the speed and drop the difficulty. That will allow you less notes and could help you with playing phantom notes that are not there. You do improve on this when you get further into the song though.
Video: 2
1)Your posture looks a little uncomfortable. Your thumb looks like tight and bent. Relax, it helps when you play a lot of fast notes to not be so stiff or you are going to cramp up.
2) Either stand up and play or get something to put under you right foot. I use a step stool. It helps keep the bass still and can prevent unnecessary slippage that may disrupt your playing.
3) Use that pinky!!
4) Listen to the bass lines. Even if outside the game and your just listening. It does not have a soulful feeling to it. When you really hear the line and feel the groove, that is when things feel like actual music making.
Those were my critiques. Just keep up the practice and make sure to practice your scales and chords outside of the game. Mess around with the session mode and play along with all those recommendations. Do not just complete the exercise.. if you are feeling it, just keep playing. When I do the session mode, I make the view of the entire fretboard. Look for the chord changes and follow the groove.