Why is my ping always so high throughout the day?

[KillerRemedyGaming]

After i moved into my current house i got the best internet i could get (bright house) and for the first month or two is was fine but after that the ping started getting into the 50's and 60's which wasn't to bad but know my ping gets so high it's unbearable specifically when someone is watching YouTube or Netflix. I've asked multiple people what could be causing this some say it's an overloaded router, which to me makes no sense considering I've had the same router before and it worked perfectly when i was using Comcast with the same amount of devices connected, while others say that all my bandwidth is being used by the streaming of video which to me is stupid considering i pay around $80 to $100 for 40 Mbps speeds now and when i had Comcast I paid $50 for around the same speeds! If anyone could help me figure out what the problem is and if i should buy a new router or just run Cat 5 cable all around the house I would be Very Grateful. Please help me.

 

[KillerRemedyGaming]

Thanks for the help guys i'm pretty sure its my router because it happens to all other pc's when it happens. thanks for all the responses.