This is probably the easiest way to download any YouTube video without any software
1.Open YouTube in Google Chrome
2.Open the video that you want to download
3.Go to url and delete everything before y and type ss before y and press enter ,a website save from net will open
4. Select the extension of the video you want to download and done you are good to go.
Have you tried Google search?For example, here https://edupro.cc/subjects/arts/ the whole section is dedicated to video and it will solve your problem.
There are lot of options where we can download the video content effectively.I have checked application on the https://phreesite.com/url-video-downloaders/ site where we can download the video free of cost in less time.