Yes, you can configure multiple routers to work together.
Yes, you can configure multiple routers to work together.
The connection speed isn't sufficient; you need a quicker link. Netflix seems to need around 5 Mbps for HD streams. With six people watching HD, the bandwidth gets exhausted. For 4K, 25 Mbps is necessary, which highlights the problem. Ideally, each person should be limited to about 3 Mbps to maintain fairness. A 3Mbps limit would restrict streaming and other activities.