Tell them to make the videos they're missing on Youtube. If there's already 100 people making that exact video, then there's no gap to fill. Anything else can bring in some money (if you play it right).

I personally made some videos showcasing specific products I used in my hobby. I made video's that showed them in a way I wanted to see on Youtube before buying, but couldn't find. I then added some affiliate links in the description. These video's brought in some money that I then spent on other stuff for the hobby.

Don't expect to earn a living wage off Youtube. You have to get very lucky (or be incredibly good, see 'Stuff Made Here') to do that. Earning some money is quite doable though, if you find the right niche.

Do your thing, use your free time and don't expect anything.

Your first 100 videos will be awful. Quantity over quality[1] until you hit that.

Not for specific reasons, just because you're learning. If you've gotta go through hell, go fast.

[1] videos still need to be watchable ofc.

E: what is watchable though?

Begin, middle, end. Intro, stakes, hook, call to action, meat and potatoes, another cta, summary and seeya next time, don't forget to like and subscribe.

Keep a sense engaged, audio or video should always have something happening. Dead air is the sound of viewers leaving.

Reengage the audience after each scene change.

When in doubt, have a countdown to something. Show the remaining time wherever you get bored watching it back.

Record everything, edit to nothing. Make the video the shortest it can be while still watchable.

Believing effort is equal to reward is an express train to burnout.

Same as any other business: give the people what they want, ideally something no one else is giving them.

Otherwise, just do it for yourself, go hard, go deep, and hope for the best.

Find an underserved niche and start feeding it.