Hi,
Yes you may be able to do those things even with a recent cheapest build.
If you need help just tell and people may help you to build something cheap.
Just precise where are you from to easier part access and your budget.
Does it have a Proper LAN network port i had a old computer and it had a older smaller version i had to remove it and add a PCI Express one
There is no "older smaller version" of the twisted pair rj45 jack (8 pins)
You might have mistaken old modem port (RJ11, 6 pins) as such.
That aside, from the specs, 1GB ram, 24GB disk, it sounds like it would struggle on displaying movie content purely from processor standpoint.
your Internet speed is just a speed limitation, 24mbps should be more than enough to watch movies/sports though.
and it is more than what I have now. (or can have, no better available at the moment)