Only if you don't mind risking putting too much in.

A proper job is quite cheap and includes weighing what's in then adding the correct amount (gas and oil). Any competent a/c shop can do it - no need to go to a jag place.

 

the AC Pro bottle i saw in the video showed that there was a pressure gauge that shows whats a good amount and whats too much

 

That's gauge is a joke, and shows you, like all the suckers that buy those bottles, don't know what you are doing, and you shouldn't touch an AC system.

 

You need to fix your leak. There is NO short cut!
Your just wasting time and risking an even more expensive repair.
.
.
.