New approach to support force-HTTPS videos

Usage

1. [optional] Install FFmpeg in PATH so that you can type ffmpeg to call it anywhere.
2. Chrome-based browser, press F12 to call up DevTools and switch to Network tab
3. Open anime episode on iQIYI, slide the video @ every 3-6 minutes (depends, iQIYI splits videos into 3 or 6 minutes)
4. Right-click in Network tab and choose Save as HAR with content, save HAR file to local disk
5. Open terminal and run iQ2 <filename>, that <filename> is the HAR file just saved. The program will start downloading anime episodes automatically and merge them into a single mp4 if FFmpeg is installed