I'm using an ancient laptop which was my dad's and it was bought like 10 years ago but it's still running (not so smooth) somewhat good. Quick Specs:

3GB RAM (upgraded)
160GB HDD
2.00GHz Intel Celeron

I'm not sure with it's Video Card though but it can play movies in 1080p. I want to upgrade soon but I'm still thinking whether to get a new laptop with higher specs or just build a desktop since it will be much cheaper compared in getting a laptop.