Filterable video gallery for vertical videos

Hey guys,

I am running into a problem while building a page for my vertical video portfolio. As the importance of vertical video grows rapidly, I want to create a user-friendly subpage with vertical video work only: https://www.lassereinhold.de/vert

Attached, you can see my current approach. What I don't like about it: Even though I managed to create these scrolling-buttons, there is no way, to filter for specific topics or video-types. Thus I want to create a gallery with filter options on top i.e. "Corporate", "Social Media", "Sports and fitness" and so on.

So far, I have tested building it using a blog page. Since I have purchased the Universal Filter plugin, I already managed to create a blog-page that has all the filter- and tagging-options I need. The only problem is, that I don't need a dedicated sub-page for every video. I want to be able to play the videos instantly from the main page, just like it is now on my website.

Is there any way, to replace the preview-picture of the blog-posts with other media, so in my case a playable vertical video?

Thanks in advance guys!