It's a "high profile 720p" file and thats too much for the defy, it seems.
Install "TubeMate" from the market, goto Settings->Maximum Resolution->select 1280x720
Then you can search for "720p" and download a video.
They play without lag and extremely crisp and nice.
You have to choose "Download" as "Watch" just opens the Youtube app.
Originally Posted by aikidoka90
I have aplied the .zip with system recovery, in the option "Flash Zip" and that was ok.
But the video test of serenity, has much lag at 1,2GHz with stock player...
In milestone 2 too?