There’s a timing tool in the resources tab. It’s an Excel spreadsheet, which comes with a guide by B.G.B. on how to use it. I’ll link it here for convenience: https://www.speedrun.com/ultrakill/resources/ij9lr

If you can’t use Excel for whatever reason, you can use this instead and it works fine:

https://www.grun1.com/utils/timeCalc.html

I repost this a lot in the ULTRAKILL Discord and the people I've given this video to have always said it helps, so I'll post it here too. Keep in mind that you don't have to record at super high framerates because that increases your file sizes drastically.

EDIT: Adding on to this, you'll want to minimise OBS into your system tray. I find that also helps a lot.

REACH HEAVEN THROUGH VIOLENCE