Everyone always says "good seo", but a lot of people may not know what that means, so I'll give you check list when making a video.
Making the video.
1. First research and find a video idea that has not been done 1000 times, but also has been done. (so you can get into the already done suggestions feed).
2.Make the video, make sure there is never a boring point. You want a high watch time.
Posting the video.
Title: make sure the title is enticing, but also fits your keywords. If you are making a gaming video about fortnite the title shouldn't be "Fortnite Gameplay #23423" the title should be "I Got 19 Kills! | Fortnite Gameplay". The second title pulls people in because of curiosity.
Description: Don't leave your description blank and don't just put your social medias in it. The first part of your description should be a 300-900 description of the video. When writing the description try to use as many tag words and title words as possible without seeming spammy.
Tags: Research your tags and find ones that are high search volume and low rankings. You could use VidIQ or TubeBuddy. Use title words for the tags and description words.
If you follow all these steps and you have quality content, you can get everyone of your videos ranked.