Premiere Pro Exporting Problem

I use CS3 (because it's the highest version that works on my pc) and videos I export have this annoying low quality look to it (check boom). Notice how bosh has this weird outline/shininess to him. I know it's an exporting problem in premiere because when I watch the hypercam recording beforehand it's fine. I'm not sure what it is though, and I tried messing with the export settings but nothing i've done works.

Halp?

EDIT: Also I don't do HD because half the time HD videos on YT lag for me.

I don't know anything about premiere

What I make sure to specify every time I export:
29.97 fps (aka 30fps + drop frame)
H264 (or MPEG4) compression
file format: quicktime/mov (I'm on a mac)
Size: 1280x720

if you don't have options for any of that you should be using a different export button

also you should get a youtube downloader add on. I do that whenever I have crappy internet and watch offline.

Here are the settings I use for my LP's and should also work with LR.

Size: 1280x720
30FPS (that's what I record in with Dxtory for LP's)
H.264 format (it saves out as a .mp4) (these are the recommended compression settings for youtube)

https://i.imgur.com/3od3k.png

Best option and what I use. I usually use 1920x1080 as my resolution, but 720p or 480p works as well as 360p

https://imgur.com/sMR0q

Not a bad alternative, but quality isn't perfect

https://i.imgur.com/7Q5P3.png

I'd only use this if nothing is working. But eh, It does its job

_____

One thing to keep in mind is that you should have your export settings, and your sequence settings coincide with each other. If you make your sequence settings PAL format, don't make your export settings NTSC. Keep it relative, and have it match the recording too