Don't forget people that TV footage is copyright material. Asking for footage to TV programs, films or sporting events breaks this forums Acceptable User Policy. Anyone who actually supplies the said footage is of course commiting a criminal offence.
Of course the TV networks may offer copyright free clips of TV footage etc. so always check there.
While we're on the subject, recording from the TV is legally defined as 'Time Shifting'. This means the recording is being made only so the viewer can watch the program at a later time. However lending the tape or copying it for the use by others is illegal. Just so you know :)