Summarize this article in one sentence.
In a web browser, go to https://www.youtube.com/. Click the search bar at the top of the YouTube page, type in the name of the video that you want to download, and press ↵ Enter. Click on the video that you want to download. It will open. Click the address of the video that's in the bar at the top of the browser window. It will look something like https://www.youtube.com/watch. On your computer's keyboard, press Ctrl and C (Windows) or ⌘ Command and C (Mac) at the same time. This will copy the URL. Click the AVC icon, or click the window to bring it to the front. It's at the top of the AVC window. A pop-up window will appear. On Mac, click Download Video at the top of the window. This green icon is in the upper-right side of the window. A text box will appear at the top of the AVC window. On Mac, click Add URL in the bottom-right of the window. Click the text box, then press Ctrl and V (Windows) or ⌘ Command and V (Mac) at the same time. Your copied YouTube URL will appear in the text box. On Mac, click OK after pasting the video URL. Your download will start. On Mac, first click the checkbox next to the format you want to download the video in, then click OK. You can watch the progress of the download by viewing the blue bar at the top of the download page. By default, videos in AVC download to an AVC folder in your computer's Videos folder.

Summary:
Open YouTube's page. Search for a video. Select a video. Select the video's URL. Copy the selected URL. Open the Any Video Converter window. Click the Add URL(s) tab. Click +. Paste your copied URL. Click Start Download! It's a blue button at the bottom of the page. Wait for the download to finish.