f=/tmp/youtube-urls;sed 's/^/url=/'|exec curl -K-|exec grep -o "https%3A%2F%2Fr[0-9][a-zA-Z0-9.%_-]*"|exec sed -n 's/%26/\&/g;s/%3D/=/g;s/%3A/:/g;s/%2F/\//g;s/%3F/?/g;s/%25/%/g;w'"$f"'';case $1 in --help|-help|-h|-?)exec echo usage: echo youtube-url\|$0 \[fmt\] \[saveas\];;*) a=$(exec grep "itag=$1"\& $f 2>/dev/null);case ${#a} in 0) echo "the fmt (itag number \""$1"\") is not available. here are the available formats:";exec grep -o "itag=[0-9]*" $f;;*)exec curl -4o ${1-$c} $a;esac;esac

The idea of interactively selecting the format seems like it would become cumbersome after the user learns the formats, i.e., itag numbers, that she can play on her computer.

Once she has that knowledge, she will just be looking for the same itag numbers every time, e.g., 18 or 22 are popular for mp4.