I spend on average around 10 hours per video. (1h ideation, 4h filming, 5h editing+thumbnail). I make at least a video a week, often 2 videos. How much time you spend per video will be up to you. There are successful youtubers who spend just 8h per video, while other successful youtubers spend A LOT more.

I think of every video like a lottery ticket. I know a certain percentage of them will become "hits", ie. give me 100k+ views. And I know the more videos I make, the more of these hits I get. I also know that over time I will get better and better at my craft, and increase the likelyhood of any video to become successful. I never had a schedule, and I don't beat myself up if I don't post a particular week. I just keep working on my videos a little every day, and post the video as soon as it is done. It has resulted in 1-2 videos per week over time.

I know that it is probably best to keep a schedule with strict times, because then the audience will show up once they learn the schedule. But I am always too eager and can't bring myself to not post immediately, and it has worked okay for me :) Most important thing I think is that you don't take long breaks of several months. I think your audience cares about consistency, but not the algorithm.