internet channel

Hello- I'm a tech newbie having a problem with my Wii. I'm trying to help my son get on the Internet Channel. Our Wii is a few years old and we just set up wireless internet in the house. The computers in the house work fine, and he's even playing Mariocart online through the Wii but we can't...

Everytime I try to watch videos certain videos, I can't see them. Then I try downloading Adobe Flash Player for my Wii internet, but it doesn't work. What do I have to do to watch YouTube videos in HD on my Wii?