The videos are all recorded in plain old MP4 so will play on any PC or mobile device which plays MP4 files. I highly recommend you maximize the screen at the start. Unfortunately Google Chrome and Safari reset the video if you maximize or minimize the screen it will play from the start. It's just the way they serve videos I'm afraid.
All videos stream off super fast Amazon S3 servers. They do not stream from the website. If they are slow or jitter then it's how your device is buffering the file. Often it takes 15 seconds to download the first section before it plays correctly.
Each video will show the length as you start to play it. We try to keep them at around 10-20 minutes each but some will be less or more depending upon the topic being discussed.
We provide both a normal and closed captioned video for those who are either hard of hearing or don't want the audio to play (if they are in a library for example).
It can be hard to see the maximize arrows because they are white. Here is a screenshot of the controls.