when i came home on my computer i could play videos good but now when i came back i try to play a video and it just pauses and

More information needed please.

Is your computer a laptop that gets connected to other networks while away from home and then connected to your home network when you return?

Wired or wireless?

Online videos? From what website(s)?

What OS do you have? What software are you using to play videos?

Do any other home computers have problems with playing the same videos?