You can try using the timecode feature. I advise creating an adjustment layer and placing it on your timeline above the section you want to have the counter. Change opacity to 0% to get rid of the tinted background, where it says field symbol untick the box to remove the big dot, change format to frames, for timecode source you will have to play with it and fiddle around to your liking generally it should auto count each frame but you might need to change this to aid the number changes, like how their counter hit 301 then all of a sudden hit 1mil+ lol I like that little attention to detail. That should do the trick, you can then change the position as well via the timecode settings. The reason I say put it on an adjustment layer is if incase you want to try and manipulate the text colour which I'm not fully sure how to do, if not you can just apply the timecode directly to the clip you want the counter to show up on. You MAY need to nest it as well for further stuff but from there you can google any extra stuff you might want to do to the timecode. My knowledge of it is fairly basic.
