ZSNES, Youtube, Recording Gameplay

Okay, I’ve been messing with this for awhile now and I can’t figure this out. Several people on Youtube managed to record very high quality vids of their ZSNES gameplays, however when I try to do the same thing the quality turns out real bad compared to theirs.
Is there anyone here who has experience with this and knows how to fix the quality to be better? (Also as a sidenote, the resolution of the vid somehow always defaults to 256×224 when recording in ZSNES, even after changing this in the config file. So I’m not sure how to change that, but I’m pretty sure that might be why the quality reduces so much when uploading to youtube, since it gets enlarged again).
Answer #1
Bump lol.
Decided to mess with this again. Still need help on this matter. Last year nobody replied, hopefully someone with knowledge about this registered on the forums since then.