[PURPLE_2L_LX]

Glowplugs working? Fuel pressure when cranking? Cranking speed? Changed the fuel filter recently?
(check you have not fitted the filter backwards, may sound silly but its been done more than once)

 

[PURPLE_2L_LX]

Seems to be more than just the startup, you revved it up and it cutout at the 44seconds mark. Didn't look like you
switched the ignition off yourself.

If you hold the engine at 1500rpm - 1800 rpm using thre throttle will it stay running? Can you do that long enought to get
some heat into the engine?

If it gets easier to start with a hotter engine it maybe the glowplugs, could be a timing issue or a lack of fuel pressure though.