It's very easy to use your mobile phone or a cheap video camera, the sound quality is good if you are close to the camera / phone. If you want to increase the quality of the sound, you can put an external microphone to connect to your phone / camera.
Software you can download "Microsoft Movie Maker" it is FREE of charge to download and use. It's simple also, you may have to play around with it to get used to it, otherwise there are YouTube videos explaining how to use it. It also gives you the option to save as a YouTube movie file, so it is easier to upload. You can also increase the quality of the sound on this program as well.
You can download Movie Maker here :
https://www.winmoviemaker.com/
Or if you are a little more IT savvy, you can try this program which is a lot better, and FREE as well
https://www.movavi.com/support/how-to/windows-movie-maker-alternative.html?gclid=CjwKCAjwwZrmBRA7EiwA4iMzBEsgrrX7rRBzNk-likGw0n912-CyIEIRhhZWo7wWL-Fp7B5EKqpifxoCCkoQAvD_BwE
Next, create a YouTube account, again this is FREE of charge, and you can upload as many videos as you want, free of charge. There is no limit.
If you have a laptop and a mobile phone camera / video camera the only expense you would have to purchase is an external microphone.. again that is optional, however it would only cost around 10 pounds / 12 dollars.
It is cheap and easy to create videos on YouTube.
My channel is : www.YouTube.com/npjy83