Of course, further to the above post, if the DEC transistor really is equivalent to an NTE-128, that is a relatively high voltage video output transistor. So it is important to check what voltages are involved in the circuit.
If it is a high voltage circuit then my recommended replacement would be a BF336, BF337 or BF338, , but they might not support the collector current. And the 2N2222A might not support the collector voltage, but would likely support the current. Do we know how much is expected of it ?
the BF337 is a silicon NPN transistor preferred for use in video output stages in monochrome and color TV applications
Since the NTE128 part is well rated at a moderately high collector voltage and 1A collector current, probably that is the one to go for.
A 2N3439/2N3440 is a high voltage rated 1A collector current device in a suitable package:
(1 PC) RCA JAN2N3439 Bipolar Junction Transistor NPN Type TO-5 NSN# 5961-01-423-9272. ELECTRODE INTERNALLY-ELECTRICALLY CONNECTED TO CASE COLLECTOR. SEMICONDUCTOR MATERIAL SILICON.
The 2N3440 looks very good, probably ideal for the job if it is a high voltage range circuit ( I have bought lots of original NOS parts from this store, never a problem, all genuine parts):
Qty 2 2N3440 RCA NPN Silicon Si Transistor TO-39 - NOS.