Are you proposing to block any post that has a video anywhere in it? Any OP with a video? Even OPs with a skippable video and six paragraphs of well written text?
Do you mean the "Latest" tab that goes to a page headed "Latest Discussions"? All the posts shown there are categorized. If the posts are primarily video, they will show up labelled there as to the forum which would be Liberal Youtubers or Cable News Clips or Music Appreciation or Netflix Streaming Videos DVDs. Easy to avoid. It's a problem?
Do you mean General Discussion? It's its own forum so video-centric posts are not labelled, but should be.
I'm not seeing and have not seen a 2/3 ratio in either place. There is no "Video section" { on edit: there is the tab}, but there are the four (or more?) forums I mentioned.
Other posts / OPs should have some discussion first, and maybe a video to explain or provide context to a point. So that the video can be skipped.
All video posts should have an explanation of why someone should spend time looking at the video. I and many other people do not have time to look at a dozen videos for a minute each to decide if they want to spend ten minutes each watching the rest of them. I can pop into and skim a dozen OPs in a minute. Not so with videos. I can read an article three times faster than I can watch the equivalent words being read in a video. Plus most videos have a lot of "Hi, thanks for watching, isn't it great that you are here, donate to my patreon, the weather is great here today, I'm so excited to bring you this news, you'll love it, blah blah blah....".