Just looked at your latest vid, how much did you clean your rad out before you set everything up? There is one shot of the res in your vid when you can see tiny bits whoosing in the res, these are probably bubbles. Its hard to tell but these could also be very fine "silt" which is usually from solder flux which hasn't been fully flushed. This stuff can easily be mistaken for tiny bubbles. You can tell for sure when you switch the power off, if it is solid residue it will sort of float about when the water stops moving, whereas bubbles would tend to rise. Also, looking at your loop config again, you best method to bleed would be to put the base on its back, i.e. the side where the mouse/kb/psu power leads all plug in, that wants to be on the bottom, making sure the res has enough water to ensure the pump inside is totally submerged. If you position the case like this whilst filling the rad inlet/outlet are in the right orientation. You mention a couple of times above about the pump stopping cos its ran out of water, you really shouldn't be doing that as it is not good for a pump to run it dry. When you tilt and move the case it is critical you turn the power off if it looks like the fluid level is going to go below the pump inlet, i.e. the classic flip on/off maneuver.