You can really use any modern video camera or DSLR, but as it was already said above, lighting and audio is what will make the real difference. These will make or break you.
You will also want a tri-pod and learn how to frame a shot properly, as well as how to edit your clip so it's not boring. For example, you see how many Youtube videos have quick edits, or jump cuts, to keep it moving and fresh looking.
You don't need to spend a lot of money to make great looking videos. With the right lighting and audio you can even shoot it on your smart phone if your cam is good enough. Not ideal, but it will get you started.
Look around here, Youtube has a lot of info and there is a TON of videos out there showing you how to create good Youtube videos:
https://www.youtube.com/yt/creators/
Good luck!