If you're just starting out, like this Astropotamus, you're more likely to want to spend money on better Time Machines and cameras than software. That's fine - when you're ready, there's some commercial software that you will probably want to buy. Until then, here's some free software that will make your life much easier! These links are generally in the order in which you would use the software in capturing, processing, and finalizing an image from a Time Machine.
The reverse of OBS, VLC is an incredibly powerful and diverse media/stream player
Please consider supporting the creators, developers, and maintainers of these products. Many are free only because of the incredible hard work that they have put into creating the software, relying mainly on small donations to help get by. Your support can make a big difference and I strongly urge you to consider donating to keep these works free!