Editing Comfortably Numb Live Pulse Version Uncut

I’ve been trying to edit Comfortably Numb Live Pulse, the Uncut version and I haven’t yet obtained the level of quality I want it to have.

The original version, edited by Pink Floyd :

The version I want to edit to change the quality:

The difference is quite clearly noticeable and do seek to 6:00 to understand the difference between them.

My problem is, I do not know how achieve this by the right usage of some particular tools.
I have tried some methods, but alas, it did not come out right.
So, if someone could help me with this, I’d be very grateful.

The sound quality (bit-rate) on the YouTube player is dependent on the playback quality selected :
[ see http://en.wikipedia.org/wiki/YouTube#Playback , “Quality and codecs” ]
If you select the HD playback format the sound is better, (higher bit-rate audio), than on the standard 360p[ixel] format …
YouTube v=xNHxTWOKvgM#.gif

Thank you for your reply.
I am aware of the HD playback and I have actually obtained the FLAC file of the audio, sized up at 80.6 MB.
And, as I’ve mentioned in the previous post, the difference is easily noticeable, irrelevant to the playback quality.
But, the problem is more than that.
I want to edit the audio file such that it doesn’t contain so much noise, doesn’t appear to be piercing when being listened to, and has more surround sound --atleast, the illusion of it.

The frequency response of the first version is noticeably “lumpy” (See Plot spectrum - set the “Axis” to “logarithmic” http://manual.audacityteam.org/o/man/plot_spectrum.html)

The first version also shows more signs of “compression damage”. Encoding such as MP3, AAC and such like, achieve a smaller file size by discarding some of the information, and crushing the remaining data together as tightly as possible, This process reduces the sound quality. The quality loss cannot be recovered.

The second version is all round better quality. You can probably reduce the quality of the second one to make it sound like the first, but not the other way round. You need to start with a high quality recording. If you start with a high quality recording, then you probably will not need to do anything to it.

I ended up reducing the sound quality, as you had suggested.
I used methods such as Clip Fix and Equalization and I ended up with something that I could be satisfied with.
Thank You very much for your help !