Yes, you are confusing me. To clarify, check with engine at idle, and no it shouldn't stall the engine at idle, but you should notice a notable load on the engine if things are proper. On a 753 C series, which is I assume you have by your s/n, the main control valve has a main relief valve that provides relief for all loader functions, i.e., lift, tilt and auxiliary functions, set at 2500 psi. A port relief is fitted to the loader arm lift up functions set at 3500 psi.
What I was saying was operate your tilt, engine at idle, tilt up until the cylinder bottoms out. At that point, if it puts a good load on the engine, and especially if the machine is able to tilt up a good scoop of material with the bucket without laboring to do so, then it's likely your pump and main relief valve is good.
If yes, then you've isolated the problem to the loader arm circuit, either faulty port relief on loader arm circuit or faulty cylinder piston seals. Obviously it won't raise the arms, bottom out the cylinder and load the engine, I can see that much watching the video. So check you cylinders one at a time. Loader arms all the way down at rest, relieve the pressure on the circuit by pulling up the manual release and working the pedal. Remove the hose fitting connected to the base end of one of the cylinders, cap the hose, leave the cylinder fitting open. Start engine, tip the pedal for the loader arms as you would to make them go down. If you have oil coming from the open fitting on the cylinder, failed piston seals. Check the other cylinder the same.
If cylinders check OK, disconnect the hose connected to the base of both loader arm cylinders, cap both hoses. Start the engine, at idle, tip the pedal as you would to raise the loader arms. If it doesn't put a good load on the engine then you likely have a failed lift circuit port relief valve or some other fault with the control valve.
