If your goal is primarily to share or save a segment for personal reference, YouTube offers native tools that don't require external software. Create & manage Clips - Android - YouTube Help
Whether you need a five-second clip for a presentation, a specific tutorial step, or a funny highlight for social media, downloading an entire two-hour video just to get a small segment is a waste of time and storage.
There are several ways to across desktop and mobile devices, ranging from built-in platform features to specialized third-party web tools. 1. Using Built-in YouTube Features (Fastest & Legal)