BUT... if you trust me and agree with my previous movie reviews, I would recommend you do not watch the embedded trailer.
One problem with extended trailers like this one (two and a half minutes) is that they often give away the entire plot, rather than just offering a subject matter and a mood. I found Jules in a list of library DVD new acquisitions, and reserved it based on the cast and a high Rotten Tomatoes score, but I had not seen this trailer. So, when I watched the movie one evening this week, I was recurrently and pleasantly surprised by various developments that are unfortunately clearly revealed in the trailer.
This is a science-fiction/fantasy movie that requires a significant suspension of disbelief (undetected UFO crash in a backyard, and an alien sitting on your living room couch). Once you accept those premises (perhaps reinforced by your favorite recreational beverage or substance), you can enjoy a delightful movie. Ben Kingsley is absolutely superb in his portrayal of an elderly man who is worried about the possible development of senile dementia. There are several laugh-out-loud scenes (especially his visit to a grocery store) that derive their humor from the absolutely deadpan presentation of a seemingly-impossible situation.
The movie is not currently streaming for free, but you should be able to borrow the DVD from your library (our library has about a hundred "holds" for 30 copies, so a wait of about three weeks).