The speed limit is often artificially low to entice people to speed though. Especially in towns like this that subsist off speeding fines.
Back in 2007 a group of UGA students drove the 285 loop around Atlanta at exactly over the posted speed limit (at the time 55mph). This caused traffic to back up for hours and the teens were arrested for blocking the flow of traffic.
And, from personal experience, driving on 285 at less than 70mph is absolutely terrifying. You're liable to get hit by someone who is just moving with the flow of traffic. It's substantially less safe to adhere to the posted speed limits.
So what is the expectation then, if not to speed?
I think there's some confusion here over your proposed set up.
What device do you imagine having plugged into the HDMI of your TV? Is it your laptop or something else?
Are you intending on watching the videos through the web front end you're imagining, or just using the web front end as a "remote control" as it were?
I don't think most of the responders have a clear vision of what you're going for.