@BarbaraM if you have a smartphone and a YouTube(=Google) account, your phone will handle most of the techy stuff for you. Record yourself with the phone and then you hit share and select YouTube under the sharing options.
You need to be logged into Google (or Gmail account) for this to work. If you don’t have a Youtube (Google) account then you’ll need create one to be able save videos up there.
After the video is uploaded you can find the link for it and you copy and paste that link into your TAC forum post. You can drag and drop it too I believe, that is where the term “drop” comes from.
If all that is too complicated there is an easier way, you start by launching the YouTube app on the phone. Have the account and channel selected and then hit the plus sign at the bottom of your screen to launch video recording straight up to YouTube.