Do i need a website for my youtube channel?

please provide any ideas of how can i make extra money with a website for my youtube channel?
channel niche: sport.. boxing

If your channel is definitely a big one, you can easily direct traffic to your website and make money with AdSense or promotion of products in the sport niche

Through the website, you can earn extra money in many ways, including AdSense, sales of some of your brands, advertising, etc.

My advice: If you are new and you are just starting, don't think about money too much, "invest all your energy" into something creative.
Create a plan and action.

Anyway, through the website, you can also reach some new people who will follow your YouTube channel and a million other good things.
It's a good option but, again, it all depends on what you're doing, what your plans are.

We should always look and think about how to find something new in life and always go towards higher goals.

All the best.

No, you don't need a website for youtube channel. You can easily earn by video creation

If you are getting views and subscribers, don't forget those are not really yours. If YT close your channel, then you loose everything. You need to build a mailing list ASAP to capture those potential clients. So, a website will help. You can just build a landing page or a complete website where you sell your products.

I am doing exactly that. Check my journey: https://www.blackhatworld.com/seo/journey-launching-my-brand-youtube-udemy-ds-store-more.1267883/

If you're looking at building a long term brand then definitely block your domain even if you don't build a website immediately. If it's a random compilation channel or one of those 'facts' or 'lists' channel then let it be.

Earning money is a different thing. First, let us know if you are making money from your youtube channel or not. If your channel has the good watching hours then you think about to making money from your new site as well.

Apart from the money stuff, if you're planning for long term and wanna do it aggressively then you must have a website of your channel itself. It's good for your brand and reputation.