Hi Shay,
From looking at your video, Blender is doing exactly what you are telling it to.
As previously mentioned the error comes from the ‘Available’ keying set not being able to set keys because there are no existing channels to keyframe. (ie – nothing is ‘available’)
Pressing i over the viewport will key all available channels.
Pressing i over the channel input boxes will key just those channels (not linked with the keying set option by design)
And when you adjust 1 channel in the input box, it will keyframe the change you made on that channel (not linked with the keying set by design)
If you want to key all the other channels as well – just press i over the viewport (after there are channels available)
The new keying set menu – the K key, will not key anything for you. That is just an easier way to change the keying set.
If you are wanting to do something different could you explain it a little more?
