Optimizing your channel at the first place: branded url, good description about your brand, profile & cover imagers, good primary trailer/video about your brand, watermarks, etc.
Use your original content in videos, don’t steal.
Thumbnails: make an attractive thumbnail for each video
Subtitles: from my experience I can tell you that videos with subtitles get more views and engagement.
Attractive titles: first of all, do a keyword research (ahrefs youtube keyword explorer, youtube searchbox autocomplete, etc.). Do not stuff keywords in your title, choose one and make an attractive title. For example: How to Gain Youtube Followers in 2022 – Best methods to grow from 1 to 10000 followers in one month.
Descriptions: write overall description for each video. Write contact details if needed (customer support, etc). If there are some credits to give – it’s important to mention them and tag them. If you put links, do not put them in the 1st 3 rows and use bit.ly or something. It looks better than long links.
Use chapters (timestamps for each significant part in the video). It looks like that:
00:00 What are Youtube video chapters
00:42 How to make Youtube video chapters.
Use hashtags: you can use up to 3 hashtags related to your video.
Use tags: unlike the hashtags, youtube users can not see the tags, but you can signal Youtube your niche & topic. Use the tags from keyword research.
Know your audience: first, make your content to fit your audience. Second, chose age limits, mark if the content is good for children or not.
Encourage your audience to make an interaction – to comment. Videos with comments get more impressions.
Build playlists.
Share your videos on social media and invite people to watch your content and to comment their thoughts about it.
Be careful if you are buying views.
This is the basis to start with. Good luck!