I just watched the current any% wr and some things looked a little weird to me, I've never seen anything like it before. Just wondering if anyone can shed some light on them.

At 59:45 during an attack, the screen completely fades out. At 1:02:05 when the opponents zoa attacks GFC's thtd the card art for thtd is distorted and the name reads as skull knight.

What causes things like this?

The screen fading out is a method of manipulating the RNG during a duel. You start a 3D battle by pressing square instead of X to attack, and then cancel out of the 3D battle animation straight away, which (I believe) prevents the RNG from advancing a certain number of times, caused by the animation of the regular card attack i.e. the slash and card going up in flames.

The thing happening at 1:02:05 is a minor graphical glitch caused by using the fast disk speed option on a PS2. It is purely cosmetic and has no effect on the game.