Yeah... Other than adjusting the levels and EQ (frequency balance) you are pretty much stuck with what you've got. The CD doesn't sound any worse than the video, does it?
Pitch correction is normally done to solo vocals before mixing. If you have a mix (as you do) you can't change the pitch of one vocal/instrument without affecting them all. Pros use Auto Tune or Melodyne. There is a free pitch correction plug-in called Gsnap, but I've never tried it. Of course, in a professional studio there is rarely a need to correct the tuning of instruments, only vocals.
The natural reverb that sounds great coming from all directions when listening live sounds excessive and unnatural when coming from a pair of stereo speakers in a smaller room. The trick is to get the microphones closer to the performers to get the right balance of direct and reflected room sound. This may take some experimentation. Getting the mics closer will also reduce room noise, which is also a lot more annoying on a recording that it is live.
Most modern recordings are recorded in soundproof "dead" studios, and any reverb is added artificially in post production. But, some acoustic recordings are recorded in a room with good-sounding reverb and careful mic positioning.
P.S.
MP3/WAV Project burned to CD sound awful
One more minor thing for future reference - MP3 is lossy compression. Dolby AC3 is also lossy compression. Regular audio CDs use uncompressed PCM like WAV files. You are stuck the Dolby AC3 but
you should avoid MP3 as an intermediate format. These formats are not "terrible", but if you want to distribute your recording in MP3 (or another lossy format), the "best practice" is to compress once as the final step.