My 86 starts like that with 329K miles. UKN miles on Pump and Injectors.
Our days now are up around 78 - 81 and nights down to 36 - 45 or so.
Plugs are manual, hold toggle down and count to 6 and she lights off like in your video.
Any time the rest of the day never need to use the GP`s.
Now when the white stuff starts piling up in the mountains, and the nights get down in the 20`s, need to glow to a count of 10 or so and she starts pretty much like your video.
You really need all good electrical connections, grounds etc... and good cables that are not cracked from age.
2 good group 65 batteries that are fully charged along with a good strong Starter to spin the engine over fast.
Winter is coming, good time to do a through cleaning of the system. OH, and a Block heater that works, it can be a life saver if the plugs decide to not work...
Goat