The first problem I notice is that you post irregularly and post around 2 videos per month on average. You definitely want to get that up. Try to make a proper schedule as well. I recommend picking a weekday and committing to posting a video on it every week.
I can hear you breathe between sentences. That makes the video feel less professional so work on editing that out.
The narration feels a bit unnatural and it sounds like you're reading straight from a script. I would recommend making an outline for what happens and then improvising the actual lines when recording. It tends to feel more natural that way.
You might want to consider chasing trends in the beginning while building your audience. If you start commenting on news and current events or internet drama (for example) in between your life advice videos you will probably get attention quicker.
Your thumbnails are also pretty generic, but I can't give concrete advice on fixing that.
Overall I think your videos are good. If you post more frequently I think you can get popular over time.