It’s a bit annoying to get a link to a YouTube video with the instructions “wait till about 4 minutes in”.  You can actually modify a YouTube url to send people right to the exact spot you want them to see  very easily.

Append the following to your YouTube video URL:

Note: The video will still have to buffer, but its generally very quick (quicker than loading the video normally, then “scrubbing” ahead) in my opinion and far more convenient.