Hi, before accepting, please read:
If you want to use your computer aside from the server, I would suggest a virtual machine (for example with Virtualbox). You can shut down and restart the server whenever you feel like it. When it comes to the possible power of the server, as always, it depends on the specs of your computer. If you have a high end computer with 8 cores +, several harddisks/ssd and heaps of RAM (16gB+), then the server would be quite potent. Only bottleneck could be the network-connection, as you want to stream videos, which takes at least 4 mbit per user.
Would this project include the installatkion of the streaming-software or only the setup of the bare server? Which server OS is required?
Best