Well you can see which indexes are not built online by looking at the requirements for online index rebuilds. It isn't that the maintenance plan or database engine will arbitrarily decide which are online and which are offline.
To see which index is rebuild at what point, you'd have to profile the activity with something like sp_whoisactive, extended events or SQL Trace - but you should make sure you don't trace too much or cause too much load from your checking.
Also I notice that you are sorting your results in TempDB - is there a reason you've selected that? Have you noticed any issues in TempDB size with that set?
I know I've said this before in other answers to you so I apologize if this sounds like I'm hammering you here - but I would strongly suggest you look at a script like the Ola Hallengren maintenance solution. There are others - SQL Server MVP Michelle Ufford has also written one. These scripts do a few things that maintenance plans just don't do and the benefits seem to be exactly what you want:
They log very detailed information - These scripts will log to a table a bunch of data. Including fragmentation level before rebuild, exact time that index was rebuilt or reorganized, exact duration for that one table.
They only touch the indexes that need touching - Rather than just rebuild all indexes whether they need it or not (the maintenance plan approach), these scripts intelligently analyze fragmentation, and then make an attack plan based on the settings you provide in parameters to either ignore, only reorganize or rebuild based on fragmentation levels. This avoids you having to rebuild an index with only 5% fragmentation time after time. This will undoubtedly give you a benefit in terms of duration and impact.
Ease of scheduling - Maintenance plans have their place. But some of the questions I've seen from you on this topic keep falling around scheduling, multi-server, interaction with jobs, a desire for more control and visibility. These scripts, or even rolling your own based on their examples gives you exactly what you are looking for here.