Don't know how to download videos from the Internet (Wistia videos)

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".

1. Open the Wistia video (the URL should be something like "http://fast.wistia.net/embed/iframe/........").
2. Copy the URL and paste it to the ClipConverter online video download tool, choose the proper format and select Download.

This extension for Firefox browser will add a button next to your URL bar where you can easily download videos from most of the websites. Unfortunately it doesn't work on Youtube. But it works on Dailymotion, Vimeo etc.

You can find it here.

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.