BillyG said
Right - I'm back - update to the post #16 above - simple maths ( well, arithmetic ) tells us this from the score - 

4/4 time

First part -

1/4 note = 75bpm for 8 bars

i.e. 8 bars = 32 x 1/4 notes, each 1/4 note lasting 60/75 seconds = 0.8 seconds

So, Opening 8 bars lasts (0.8 * 32) seconds = 25.6 seconds

Second part

1/4 note = 80bpm for 57 - 8 = 49 bars

i.e. 49 bars = 196 x 1/4 notes, each 1/4 note lasting 60/80 seconds = 0.75 seconds

So, final 49 bars lasts (0.75 * 196) seconds = 147 seconds

Total duration should be 147 + 25.6 seconds = 172.6 seconds

= 172.6/60 = 2.88 minutes = 2 mins 53 seconds

 

And that's exactly how long the entered MuseScore version runs for.  You'll understand - I just HAD to do this check in case something HORRID had happened within the underlying timing of MuseScore ( I do a lot of wicked things with the sound and low-level MIDI drivers and I had to convince myself that nothing untoward had happened !!! ).

The upshot of this little experiment is - no - you cannot rely on the video, or the extracted MP3  I provided above for anything other than early practice - do NOT use it for submissions - we'll need a properly created MIDI/MP3 to work from as a click/backing track - as @Fiddlerman says in post #17 above...

This has been a busy day - and now I have to go out again...   rats....  laters  

Perhaps the recording is actual humans with a real-life drummer.  That would account for it.   

Q: How do you know when a drummer is at the door?

A: The knock speeds up.

Q: Why are drummers in bands?

A: They like to hang out with musicians.