Save videos as .webm automatically
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I being tyred deselecting mp4-mpeg4 and selecting "all files", and later writing ".webm" at the end of the name, when download a video. How can I do it automatically?
Either the video is a WebM and you download it in this format or it is not and you need to transcode it, a lengthy process that will inevitably lead to a loss a quality (you cannot gain quality). Transmageddon (in Trisquel's repository) is easy to use and can transcode to WebM (among other formats). Just choose "HTML5 WebM" as a presetting.
When watching videos in youtube, I do so with HTML5 Everywhere, always in webm format. When I save video, I must to do the wrote above.
What you're saving isn't a WebM. It's an MP4 with h.264 compression. The browser knows this, and that's why it's choosing the appropriate extension for you. All changing the extension to ".webm" does is makes it more difficult for humans to tell what kind of file it is, and potentially make some badly-designed software incorrectly identify what kind of file it is (rendering them unable to play it). It's still h.264 regardless of what file extension it has. File extensions are purely informative.
Just save it with the proper extension, and if it bothers you so much to have a file with a ".mp4" extension, transcode it as Magic Banana suggested.
YouTube does offer WebM for most videos (transcoded on Google's servers), as well. They're lower-quality, though, so downloaders don't tend to choose them by default unless you configure them to, and players don't tend to use them unless your browser doesn't support h.264.
I am a translator!
Data is just that: data. It is not software. As long as there is no DRM of any kind, proprietary formats do not restrict any of your freedoms. Of course it'd be better to share only free formats but the **use** of non-free formats is no issue in my eye.
The issue is: it is possible that the format you read/write with free software today cannot be read/written tomorrow because that free software turned illegal (because it infringes patents). The risk exists.
Formats that require proprietary software to be properly read/written are even worse. To some extent, MS Office's default formats match this definition ("to some extent" because free office suites make a very good, and very difficult, job at retro-engineering MS Office's formats).
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