Comment by anonymoushn

Interesting! I tried again and got completely different results this time. Now there's no malware tab, and instead it tries to get me to pay for a subscription to download high-quality videos or MP3s. If I click the barely-visible "Just let me download in my browser with low quality" below the paid subscription button, I get the same error as before.

Edit: the paid subscription payment flow says I'm actually buying "Televzr Premium Max Subscription for

1 Month_mp

Televzr helps get wireless access to the media library on the computer from the mobile phone"

So it purports to be something unrelated to downloading youtube videos. I didn't pay 1400 yen for it, so I won't get to find out if it helps me download youtube videos.