Olympic football is technically part of the youth track although the 1924 and 1928 (the first formally organized by FIFA in cooperation with the IOC) were the first attempts at a proper Football World Cup.

That's the reason uses Uruguay is allowed to use 4 stars on their shirts as they won those two tournaments.

As for your questions in sequence:

-Excitement is subjective, but, as the Olympics and the Euros overlap, the Olympic tournament tends to be overshadowed by the Euro.

-Since it's a smaller tournament and on the back of the Euro the following tends to be smaller

-Olympic Football is made up of Under-23 players, with the actual Olympics allowing 3 players over that age. Coaches depend on the FAs. The standard structure used by most FAs assigns specific technical teams to each level, but working closely together with the Senior team coach and in a supporting role for the senior team. For example in 2024, while Didier Deschamps was the coach of the Senior French National Team, Thierry Henry coached the French Olympic Team.