GOOGLE IN VIDEO MODE NOW ONLY SHOWS PAGES WHERE VIDEO IS THE MAIN CONTENT

Summary from the TLDR Marketing newsletter

Google made a change to only show video thumbnails next to results on the main Google Search results page when the video is the main content of a page earlier this year. This change now extends to search results in Video mode. Videos that aren’t the main content of the page will appear as “No video indexed” in Search Console—resulting in a decrease in the number of video impressions in the performance, video indexing, and video rich results reports.