Grunt, I just made an encode that is 300kb smaller then yours, has better video quality (The bitrates are different, but mine used different encoding techniques as well) and has twice the audio bitrate (Yours was 45, mine is 80).
I'll want to discuss with you tomorrow morning about tougher encoding scripts, it's slower to encode but trust me, it really crunches down the filesize. Thank Raiscan.
Archive.org download
DailyMotion
Edit: The script if anyone else is interested
start /wait x264.exe "mixed.avi" --stats "./bothumh.stats" --deldup 20 --versioninfo --ssim --pass 1 --bitrate 300 --keyint 500 --ref 15 --mixed-refs --no-fast-pskip --bframes 16 --b-adapt 2 --slow-firstpass --mbtree --weightb --direct auto --subme 10 --trellis 2 --partitions all --me tesa --merange 64 --threads 2 --8x8dct --no-dct-decimate --output "encodedboth.mp4"
start /wait x264.exe "mixed.avi" --stats "./bothumh.stats" --deldup 20 --versioninfo --ssim --pass 3 --bitrate 300 --keyint 500 --ref 15 --mixed-refs --no-fast-pskip --bframes 16 --b-adapt 2 --mbtree --weightb --direct auto --subme 10 --trellis 2 --partitions all --me tesa --merange 64 --threads 2 --8x8dct --no-dct-decimate --output "encodedboth.mp4"