Don't know how to download videos from the Internet (Using a computer)

This more of an advanced solution and it's worth a try.

1. On webpage of the video you want to download, right click anywhere and select "Inspect element".
2. Now, press CTRL + F on Windows or Command + F on Mac. 
3. Now search for the link in the "iframe" tag, if there's no any, search for the link that's ending with .mp4, .mov or some other video extension you might recognise. 
4. Once you've found the link try pasting it into VideoGrabby online tool for downloading videos.
5. If it does download a file but you can't seem to open it (for example file's extenion is .bin) try opening a file with a video player. Use VLC player. If it doesn't download, move to the step 6.
6. Open the link from the page in new tab, right click on it and see if there's a option "Save link ass..." or "Download video".

VideoGrabby is a free online tool that helps you download videos from the internet to your PC. 

1. Right click the video you want to download and select "Copy video URL/Link".
2. Go to the VideoGrabby webpage.
3. In the text-box below the "Search or paste link here..." right-click with your mouse or touchpad and select Paste.
4. Click on Go to start downloading.
   
   

   

The Free Video Downloader online tool by Amoyshare is another way to download videos. All you need to do is to paste the video URL and hit the download button - as simple as that.

You may try it here.

Videater is a free online tool that lets you download videos.

Internet Download Manager is an easy-to-use downloader tool that can help you download virtually everything. It is also a download accelerator, meaning that it can optimize your internet connection to the fullest and download files in a much quicker way. You may download it through the official website.

Note: The tool is not free of charge, but they do offer a free trial.