Yes, YouTube is a wealthy source of information, with many short but effective workouts. I actually find it difficult to sit still, so my ex-boyfriend actually got me to sit and do my computer work on an exercise ball. So, your abdominal,leg and other muscles are working to support you, making it less sedentary than a chair. I like it!
As he was in the army for a number of years he worked out a boot-camp thing for me, which was a few push-ups, sit-ups, lunges and many squats. You can dance to the music, that comes pretty naturally to me - maybe you can put on your favourite music? Electronic and dance music gets me going and it gets the blood pumping!
Last, but not least maybe try rebounding?
Rebounding (jumping on a trampoline) is reportedly used by astronauts and you can vary your routine on there. It is super fun and you burn A LOT of kilojoules. You can Google some sample routines for rebounding. Tiny ones are inexpensive too.
Our bodies were designed to move, it will help you. Many people report to have lost a lot of weight (IF that is your focus, due to the heading of the post) by simply using rebounding.
Hope that helps a little....
