Declicker shortened my audio track

[MajorFreak]

hello dear community, i'm trying out premiere+audition for the first week, and i'm a bit miffed that Adobe's software has 'desynched' (did i use right word?) my audio track from my video track by a full 15 seconds and more by the end of the 45min video i made.
i uploaded a video about this problem (short and sweet) here - https://youtu.be/zlBxb3xisGk
I'm hoping that Adobe is way ahead of my n00b self, and that you kind folks will point me in the right direction to make sure my audio stays insynch with the video total length.
I'm hoping that it's just a simple option i missed clicking.

[Ann Bens]

If the footage is variable framerate convert to constant framerate with Handbrake before bringing into Premiere.

[MajorFreak]

Hi, Ann.  What's "variable framerate", and what's "handbrake"?  i recorded a video that's 44:49 minutes in length...how can that be variable? And is 'handbrake' found in premiere pro or ...?  i'll try googling those two concepts, but it would help if you explained in layman terms, thx and i appreciate the fast response.

[MajorFreak]

the wikipedia on handbrake describes it as a "free video transcoder"... if my nvidea geforce experience recording option output to a mp4 file, isn't that already transcoded? *wanders off to google 'transcoder'*

and...uh...still not clear on what even variable frame rate stands for... i got this - https://www.addictivetips.com/windows-tips/check-video-variable-framerate-on-windows-10/