IMO this is an easier, less spillage, quicker way to do a DP on an om606. You do need a preheater to prefilter fuel line to make it work,
https://www.youtube.com/watch?v=1u2ZMenlxA8
my issue was I had the rear elevated to make priming the new filter I installed after purge, all DP how to's suggest putting a new main filter on. Fuel flows very well with an elevated rear so you have to plug off the main feed line coming from the tank in the OP's linked video or get out a bucket to catch the spillage.