As the "LG Time Machine" (a (not so) smart TV) has a limitation for video dimensions (as for codecs), I take to implement an extra parameter `--pp-params` where we can send extra parameterization for the video converter (post-processor).
Example:
```
$ youtube-dl --recode-video=xvid --pp-params='-s 720x480' -c https://www.youtube.com/watch?v=BE7Qoe2ZiXE
```
That works fine on a 4yo LG Time Machine.
Closes#5733
This is a workaround. Currently YoutubeDL.process_info() truncates
info_dict['title'] to 200 characters, but the implementation can't
handle wide characters.
Discovery.com now uses a completely different approach for serving
videos. At least in both test cases brightcove are involved. However,
AMF support is necessary for these brightcove videos. As a result, I
try to extract videos from the info page ('?flat=1'). The downloaded
file can be different from the one in browsers.