This is on my Mac Mini (M1) running 27.0.1:
This morning I come to check on my TM progress (daily BU), which will only run when the machine is "awake", and found the status was 2 days (screenshot), normally less than 30 minutes. So I opted for skip BU, and then manually re-started the BU, which was then completed in 10 minutes!!

Thoughts, or just a one-off.

I have a Seagate SMART 1 TB SSD, it comes with diagnoses software, but will only run on Windows, I use SSDReporter, but does not recognise it.
I think the drive is failing, is there a Mac programme (app) that I can instal to test it, many thanks.

I have a trail camera and it records in .avi, which will not play in iMovies or Quicktime, a quick search of the forum does not come up with anything after 2013. I have downloaded Elmedia Video Player, which works, but was wondering what other forum users use.