The truth is that FLVTO is not safe. Its lack of safety has nothing to do with the software, but the bugs that come with it make it unsafe. To start with, downloading the converter alone may bring in viruses to your system.
The software also runs dozens of ads, including a Flvto downloader chrome, while working on it. And when you do not have an Adblock, you get a lot of pop-ups. Most intrusive adverts open you up to harmful, malicious, and questionable websites and data tracking. Clicking on any of the pop-ups may result in the download and installation of applications that you never signed up for and are of no use to you.
The result is that your computer gets infected with viruses, malware, and adware. The adverts, too, are a nuisance; they crowd your screen and slow down your browsing.
Reports have shown that downloading the app into your computer also increases your CPU's power use incredibly.