I'm sure I sound overly negative, but this sounds like a terrible algorithm to me, like it's just encouraging people to create low-effort videos, hence all the channels that have several dozen 15-minute videos of themselves doing a Let's Play of a single game.
The algorithm is designed with the purpose of keeping people on YouTube. The more time people spend on YouTube, the more ads they watch, the more income generated for YouTube itself. Daily content has been proven time and time again to keep people on the site longer than more sporadic content, because it creates a lot of session starts. People who really enjoy a particular channel will visit YouTube every single day just to check for the channel's new video that day - and then they'll start a full watching session.
Now if the same channel only uploaded videos every 2 weeks - a lot of people who watch that channel and don't care much about other channels simply wouldn't bother checking YouTube until the 2 week mark rolled around again.
The algorithm doesn't encourage low effort content either, because while the algorithm takes into account upload frequency it also takes into account a whole host of other factors, one of them being how well your recent videos have performed.
If your videos are improving and doing better as your subscriber count grows, then YouTube will favour your channel more and more. If on the other hand your latest videos have been rushed, and are sub-par, and don't perform as well, then YouTube will take note of that and stop promoting your other videos as much.
Daily content will always be best for the algorithm, but it also has to have a certain level of quality to it to actually perform well.
For anyone who has considered daily videos but feel they don't have time: I was in the same boat. When I first tried daily I literally found myself spending all of my free time working on videos. I no longer had any time to relax or do anything I wanted to do because the entire day was spent working on content.
That's actually why I avoided daily for so long. Recently though I started making daily content, but I optimised my video creation process. I spend the majority of the week coming up with ideas and planning videos, with no real fixed schedule. I just let the ideas come to me while I'm doing other things, and then develop them from there into what I want to make videos about.
Then I have a dedicated day where I record an entire weeks worth of videos based on the plans I set out.
Then a day for editing the videos.
Then I have a day for SEO/keyword research, tagging/titling/describing the videos, and making thumbnails.
The result is the same 7 videos a week, but one the videos are higher quality since taking dedicated days for each part of the process makes me spend more time on each individual video - as for example on the editing day I basically assume I'm going to be working all day, and I also have a backlog of videos so I don't feel rushed or anything. Two, I actually have some free time back that isn't spent on the channel. Also, since I do everything in bulk, I'm constantly several days ahead of schedule, so if for example my internet were to go down or something, I'd still be okay to keep up with my daily releases.
Speaking of staying ahead of schedule, make use of the scheduling function on YouTube. You can upload videos in advance, set up the end cards, any mid video cards, etc. Then you can set them to be scheduled for a certain date or time. You can have your videos set up a week, or even several weeks in advance like this - this means that even if you want to say take a two week vacation, you can still keep up a daily release schedule.
