screencastRecording

Linux
Screen record: kazam
Display picture of own webcam (to be recorded simutaneously): guvcview
Animate mouse movement, show mouse clicks:
Audio Control: pavucontrol
Windows & Mac
http://www.techsmith.com/camtasia.html
Tablet
Linux: App 
mypaint unlimited canvas >> write without border
iPad: use the internal screen recording function - https://support.apple.com/en-us/HT207935
Android: Screenstream or via HDMI
Share the recording
Switch Cast: https://cast.switch.ch/
I-MATH cloud storage - https://drive.math.uzh.ch
Upload via client or app (iPad).
Share a personalized or anonymous link.