I am not sure I understand the question.
If you mean can you study Aikido solely from books and video then no.
If you mean can you train your Aikido while alone most definately.
I run a small college dojo and exams, spring and conspiricy of the Gods not one student showed up last Thursday.
I trained for a full hour, sweating like a pig at the end of it.
Normal warm-up routine
Foot and hand movements
Distance closing exercies.
Sword and Jo work
Kata training with an imaginary partner.