Like someone else said, it’s unlikely. However it is possible but it would need to exploit your media player (VLC) and/or your OS. As long as your source is trustworthy you shouldn’t have to worry, that’s why the megathread is there.
One thing I forgot to mention. On the deep/dark web nothing is monitored the way the clearweb is, meaning even if you try to avoid some things, you might stumble upon disturbing things. Maybe not images, but walls of texts or something else. My biggest advice if you want to find fun and/or interesting sites would be to look into webrings that either mirror on the dark web from the clearnet or direclty using safe search engines. I can recommend Yesterweb to start with since they not only have a big webring but also a page dedicated to interesting sites liked by the community.
Ahmia is a great search engine. They have a policy that explicitely states that they do not list cp content and they actively remove them on a regular basis if they suddenly pop-up. There used to be some sites that had lists of great and interesting onions but sadly the way onions are shown, many false duplicates showed up and now it’s impossible to find the real original sites (mainly thinking about “the hidden wiki”). If you use Whonix, they have a startpage of their own for Tor browser which lists good and reputable search engines for the network. Hope that somewhat helps.
I made a rough guide of my setup for someone wanting to download videos from their browser. Since Seal uses yt-dlp, it will work with Youtube as well.
Hope this can help you out