I've been battling the same problem for months. I just installed "VK Videos and Music Downloader 15.0.0" for Chrome, and it worked immediately!
​
Give it a try: https://addoncrop.com/vk_video_and_music_downloader/
Are they on YouTube? I've been doing this by using a chrome extension. A little button appears next to the like button and I can just click on that: https://addoncrop.com/youtube-video-downloader-6/?id=8212968
I think there's also burning copies of DVDs, but I'm not entirely sure how to do that
YouTube Video and MP3 Downloader on Crosspilot. It's a Chrome extension and a little button pops up under all videos, making the whole process very quick and easy: https://addoncrop.com/youtube-video-downloader-6/?id=8207784
You can definitely download it with most podcast apps (I use pocket casts). You can also download the file directly from youtube with something like this or youtube-dl from the command line (tech savvy only).
Grab the beat first. Instead of copying URL of video then pasting in a site to download, just add an extension to your browser. This will add a Download button to every YouTube video you watch.
Some users sometimes lose their open tabs when Opera updates. Not sure why. Sometimes they also lose extension settings where when Opera starts back up, it's like the extensions where freshly installed. Not sure why.
Maybe you ran into both of the issues and one of the extensions advertises addoncrop when it installs. <https://addoncrop.com/extensions/> is the list of extensions they have.
Are all the extensions you listed from the Chrome web store or Opera's addon site? Or, do you have some that are from some 3rd-party site?
There is a chrome extension that allows you to download videos, it embeds a drop down menu under the video. You have to manually install it and turn on developer mode, but I've been using it for a couple years without any issues. https://addoncrop.com/youtube-video-downloader/
I came across this site just now: https://addoncrop.com/youtube-to-mp3-converter-direct/
It works pretty well and has addons for multiple browsers. You have to install it through the developer interface though, but it's is easy enough and they provide tutorial for it too.
could you download it? It should be pretty eassy, I use this extension, lets you download mp3 just by clicking nxt to the video: https://addoncrop.com/youtube_video_downloader/