If you just want to record a straightforward screencast without messing around with title overlays, editing, or special features, Screencast-O-Matic is a good free option. It has been around a while and most steadfast followers are happy with it and see no need to switch to anything else. 
Screencast-O-Matic is a screencasting and video editing software tool that can be launched directly from a browser. The software has been widely used in the education sector to support video creation for flipped classrooms, bi-directional student assessments, lecture capture, and student video assignments. is used for various tasks including creating a video tutorial, transforming a presentation such as Microsoft PowerPoint into video with narration, and creating a video game walkthrough.. You can record a video of up to 15 minutes, crop the beginning or end off if needed, then publish the video straight to YouTube, within your Screencast-O-Matic account, or as an MP4 right on your computer.