you can't get a modern router with the latest wireless standards for a similar price.
Would I
need such a router for setting up your streaming video idea? The reason I ask is that I have a spare WRT54G router sitting on top of my computer hutch.
It could be that the WRT54G has currently become too slow to route your internet connection efficiently, because the speed of that connection has increased a lot over the last couple of years. This surely is true in my case. If I were to still use a WRT54G, it would throttle my connection down.
If you mean it's too slow to route over WiFi, then yes. 802.11g is not good for streaming HD video. But a wired connection of 100Mbps would be perfectly fine for HD video (probably not 4K, though).
Thankfully, Doug, fully modern routers are really starting to come down in price. 802.11ac is the latest WiFi standard, and up until recently you couldn't get an ac router for under ~$200. Now there's
this TP-Link router for $90. That will be more than enough for any amount of HD video in your home. It should even be enough for 4K video.