Well I did do a lot of research and it is said that your thumbnail and title are the most important part of creating a YouTube video as it is what actually causes people to click and discover your content.

If your CTR is very low than there is a very small chance that it will get picked up by the algorithm and your video will get very few views (like most of mine)

I hear you need a 15%+ CTR to really get pushed by the algorithm, the best I have been able to achieve is 10%.

I don't want to create clickbait style thumbnails or titles but rather create something engaging and intriguing that the video covers clearly once viewed.