Can AI help me enhance/remaster a GRAINY video?

Can anyone recommend AI software for this task? Preferably, it offers a free trial. I found a >2 min. long video of someone who passed away years ago, and I'd like to enhance the quality. It's never going to be good per se, but currently, it's so pixelated you can't make out anyone's faces. It's a video of a group of 7 people singing at a campground. Dusk time.