Help me find the synths/sounds

I'm looking for these kinds of synths. If you know which presets these came from, I'd appreciate it. :]
Thank you!

youtube.com/ watch?v=tRTcrAeEZRQ>

watch?v=DdOlvH2n5FI

watch?v=7tKPFh66wpU>
-Seems like a mix of nexus and sylenth presets but..

watch?v=DdsIVUuO7GM>
-Yes this song. The bass is pushy and it seems like I can use it.

Again, thanks for the help!
P.S. Copy and paste the links after the slashes (/). I can't post links because I don't have 5 posts...
ex. youtube(.) com / <insert portion here>
sorry..