I have seen a number now, approaching a hundred I'd guess and you are correct, some are rubbish, but every now and then you find one that you have to tell others about, hence this topic.
Take the time, watch this. I found it moving.
Stars Keir Dullea from 2001: A Space Odyssey (1968). He appears at the end.
- REMOVED CLIP -
Found another

[youtube]iYquHEJ9MQ4[/youtube]
Post your choice only if your into YouTube short sci fi films.
EDIT: I removed the YouTube clip because the associated account had been terminated?