MagicMockups - Youtube API

MagicMockups (Free Web-based Mockup Generator)
- Upload a screenshot of your system to create a fabulous mockup.
- Supports several different devices (iPhones, Androids, Macbooks, Laptops, Desktops, iMacs) – useful to demonstrate what your website would look like on mobile.
Youtube iFrame API (Easily embed YouTube videos into CMSs and custom builds)
- Very simple to use Javascript based API guide written by Google
- Can be useful to embed training videos or guide videos directly on your solution. You can even use the API to create a “playlist” of instructional videos as well as specify the start time and end time of each video.
PowerPoint Voiceover - Record a slideshow with narration and slide timings. This could be used for training purposes. See the tutorial here.