screencast
Definition:
A screencast is a video mimicking what appears on someone's computer screen. Screencasts are often used in computer training to provide step by step instructions to make it easy for noobies to learn new technologies.
Here's a word you may not know...
wi-fi hotspot
A wi-fi hotspot refers to a public wireless Internet connection. Wi-fi hotspots are common in coffee shops, hotels and other places people gather. If you have a laptop or mobile device with built in wireless connectivity, you should be able to easily connect to the Internet using a wi-fi hotspot. It should be noted that not all wi-fi hotspots are free and that some businesses charge a usage fee to use their wi-fi hotspot.