I find it easy enough to copy a YouTube video by simply clicking the blue star on the top bar and saving the video title as a "bookmark". You can then select the bookmark and right-click to "Copy" then paste the URL into a forum post.
But what I WOULD like to know is how people select a portion of a longer video (e.g. one song from a concert) and save it. I found a couple of free apps online that let me run a video of my choice and mark a "start" point and an "end" point, and the selected section of video should be cropped out and saved. But then I couldn't find the resulting video clip anywhere! I wondered whether the selection gets saved to the website of the app provider "in the cloud" and maybe you are supposed to subscribe or register in order to access it, or if there is some other procedure to be followed, but I experimented a couple of times and never could locate my video clips. Can anyone offer a solution?
I'm surprised no-one has come up with an answer to my question about selecting a section of a video, because I think quite a number of people on various forums have posted brief clips (sometimes running on a short "repeat" loop) which I assumed must have been snipped out of a longer video. If anyone knows a suitable method or app for doing that, it would be fun to know how to do it.
@graeme-ogg, I use an app called "Camtasia." It can do what you want to do and much more. It's the software I use in making and editing my videos. But, it is relatively expensive. The same company produces a program called "Snagit" which is less expensive but still can produce an edited video or a gif. There may be some free apps out there that help to make a gif. Be careful. I've had some bad experiences with downloading "free" apps.