All my downloads are opening with text edit?

Newbie here, can somebody please help me get back to how my computer used to work with downloads... No matter what I download whether its a video or just some new thing for my computer everything opens in text edit.

ne help?

You haven't really given anyone much information to go on.

1. What changed? And when?
2. Mac version? OS version? Program you're using to download?
3. What have you tried?

Just a few starter questions it would have been helpful to include.