1999 Ford E-Series Van engine problem

My diesel truck I turn it on in the morning and it takes way too much to turn on at least 3 min into cranking that's when it fires up I replaced the glow plugs then it stopped about 4 or 5 days later it did the same thing all over again that's one of its problems the other problem is that in the morning after that delaying of turning on I drive for about 15 min and I notice that she looses power extremely a little blueish smoke comes out the exhaust and then it runs like a 4 cyl gasoline engine with a misfire and you hear I guess its the injectors clacking really hard then it eventually just dies I let it rest for about 30 min then fire it back fire it up then 15 min into driving the same thing happens again what can be the problem I have a video that shows you exaclly how she runs after the loosing power occurs