Add option to select preferable format

[michellekg]

The "Download all" option is very nice and unique (I didn't see it in any other YT-downloaders), but is it possible to add some option to select, for example, only MP4 formats? Or even maybe "All mp4 except of 640x480"? Oh, and "No 3D" would be nice too )

[Kevin-De-Koninck]

I'll see what I can do to improve it, but at the moment I don't have that much time for new features (only bug fixing). But I'll keep this one open and update it as soon as I implement more options