Clutch Pedal to the floor means that nothing is pushing back against the clutch master cylinder.

Happens when you are low on clutch fluid or there is air in the system.

If you haven't already done so it might be time to check, bleed, and replace the fluid in your clutch system. It's something you want to do every year anyways.

The other possibility is this:

The clutch operates a piston against a clutch fork, which pushes against the clutch to disengage the clutch from the flywheel. If the clutch pack spring fails, or the slave cylinder actuator slips off the clutch fork, then you will lose clutch pedal travel.

But neither of those conditions are temporary like you showed...