Youtube - How do i buffer a complete video?

Most people know now, that youtube videos do not fully buffer anymore. You're buffering about ~15sec. In many cases, this isn't enough.

So, how do i buffer from now on?
Actually, you only need to change the URI. An other player opens, which is able to buffer your video. In general your URI looks like this:

    https://www.youtube.com/watch?v={ID}

You need to change the URI to:

    https://www.youtube.com/v/{ID}?version=2

For instance:

    https://www.youtube.com/watch?v=zeT_5VvGNlM

To:

   https://www.youtube.com/v/zeT_5VvGNlM?version=2

Enjoy your videos in HD!

Cheers,
Ellks