Did you try using savefrom.net? You can type "https://www.youtube.com/watch?v=IkYVmtgxebU" into the text box and hit "Download". Then you'll get a new tab that tries to get you to install malware. If you decline to install it, the new tab takes you to the malware's homepage. If you close the tab and go back to the original tab, savefrom.net presents you with an error message saying "The download link not found." and does not help you download the video.
I tried this. I went to savefrom.net. First thing it does is ask permission to send notifications.
After that there is a popup asking me if I want to continue in the browser or download their app. If I click download, it downloads a file called download_helper_2.3.27.apk.
Instead of downloading their app, if I paste a YouTube link, it tells me I can wait or download their APK to skip waiting. The download link downloads an older version called download_helper_2.3.19.apk.
When I do the process again, instead of the older APK link it gives me a Chrome extension link. But if you look at the instructions you see that it's not a Chrome extension, but a minified userscript. And it has `@include https://*` so it can basically run on any website regardless of clicking on an extension icon like regular browser extensions.
If I try to ignore all the distractions and wait for the download link, I can click it and it downloads the MP4 file. But it also opens a popunder with the domain https://refpamjeql.top/.
Not the best experience, and seems like a high risk of getting malware, but it does get an MP4 file at some point.
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.
