You can opt out of the algorithm by... not using the app, or just not using the 'for you' page and searching for every video you'd like. But even then, all of the platforms you list have billions or trillions of posts on their site, so there would be no way to opt out of algorithmic listing since something has to decide what posts show up at the top of the list. The only service I know of that actually allows you to do that is Twitter with tweetdeck, where searches can show a stream of new posts.