Is y2mate.com legal to use?

Yes, it’s 100% legal to use Y2mate because they were not fetching or stealing data from social media platforms.

What they were doing is using the API of those social media platforms in order to show the data which you wanted to download on their website and make you download the videos.

But if you want a solution where you can use an app to download all the videos from social media on your phone within just 2 clicks then you can use the Y2mate app on the play store.

If you like my answer do hit the like button.