LED projectors mainly from USA or China have many accessories, such as SDcard slot, USB , and even wi-fi built in.
You will need a HDMI ouput device for best results.
Projectors can be got for under £500 for which you can get about a 96inch Video Picture in a 3.5meter wide room.
The DLP projector is almost double the price of a budget projector. But still under £500 for which you can get up to 300" inch Video Picture.