Xbox Live Lag DSL Router?

[Rich]

I have DSL connection and a Netgear WGR614V9 router. When I'm playing Xbox and someone else watches a YouTube video or uploads something through WiFi on their phone or the computer my connection goes crazy and I can barely even play or move. Can getting a new router with "QoS" Quality of Service fix this? When no one uses the internet except the Xbox it works fine I am looolking for a way I can play and others can use the internet as well. Please help. Thanks.

[MRMAXTHEMAC]

NO SHIT. Dsl is the crappiest internet ever. its so slow, you should have lag 24/7