Yes., if it is done outside of an occupation and for pleasure and/or relaxation. A sportswriter or announcer may not consider watching curling a hobby, but does so because it is a requirement of his job.
Watching sports
Yes, television watching is a hobby.
no
that is an abomination. nobody ever plays sports because it's a hobby. sports are not a hobby. get out of here.
Watching Bella sleep...
Watching Bella sleep...
"I am watching sports" would be "estoy mirando deportes".
origami, Golf, sewing, photography, Magic tricks, Play games
Bird Watching.
yes
Watching Bella sleep...