It's open source and standardized as the downloader used by most other programs and sites. You can look through every single line of code it you want, or even run it from the source code directly.
It's just as trustworthy as VLC, and there's not a difference between either of them when it comes to their development process.
Ultimately, unless you're willing to read through all the code, every program is just a black box that could be malicious. The only thing that makes you trust one thing over another is name recognition and if others have reported it as malicious. In this case, there's overwhelming evidence that it's safe, and it's always one of the top recommendations at all use cases.