This version of Priiloader (a current dev version) fixes a bug that was causing some channels to start in the wrong video mode on cross-region Wiis (like NTSC-U VC Super Mario 64 on a PAL Wii starting in 480i on a 480p-configured Wii).
You can expect it in the next Priiloader release (any version above v0.10.0) some months or years down the line.
Install Priiloader using this guide.