I use Handbrake sometimes to compress video files, and notice that the "Web Optimized" option is not chosen by default, and cannot be set to the default in Options either.
But I tried both Web Optimized and non-Web-optimized. Turns out both the files turn out to be the same 320MB exact. But if it is web optimized, then even when I use FTP to upload to the web only for about 10MB, then I can already start watching it on the Chrome browser -- versus, if it is not web optimized, then I have to wait and upload all 320MB for it to be playable.
I am guessing web optimized probably means putting some kind of video frame indexes in the front of the file instead of at the end, so that the index is ready and users can view the video even with just 10MB or 20MB. But, (1) why don't we always use web optimized and make it the default? (2) is it at all configurable to make it the default in Handbrake so that if we forgot to set it every time, we actually have to re-encode again?
P.S. the other thing I really don't like for the non-Web-optimized version is, if I upload to my website, and I am traveling and want to access that file, and if the net speed is slow, making the video play and pause all the time, then I can download the file and play it using VLC player. But if I have downloaded 200MB or even 280MB, the video still will not play for 1 second. It has to be the whole 320MB downloaded before it can play at all