to transition people from conservative to liberal, and liberal to leftist, we have to spoon feed.

Not true. People don't undergo ideological shifts simply from running into and watching some online video. They do so after real life experiences that affect them materially. For example, they are fired in a clearly unjust fashion by a boss, violently attacked, arrested, helped by a mutual aid project, etc. And then they are ready to learn whether it's in a dribble or a flood.

Also, it is false that conservative liberals need to go through some progressive liberal phase before becoming leftists. If anything, becoming a progressive liberal tends to stick them right there, trusting institutions of capital and state, and that's the end. I think you've been listening far too much to streamers like the guy in the OP on things like this.