PHFor most practical intents and purposes, yes, but “look” must be followed by the preposition “at.”
However, there is a definite limit to their interchangeability.
“Look at” is limited to stationary objects, whereas “watch” is used for moving objects.
For example, we would not say “We looked at a movie last night.” We would necessarily say “We watched a movie last night.”
And we would say “We looked at the picture on the wall,” but not “We watched the picture on the wall.”
However, there is a definite limit to their interchangeability.
“Look at” is limited to stationary objects, whereas “watch” is used for moving objects.
For example, we would not say “We looked at a movie last night.” We would necessarily say “We watched a movie last night.”
And we would say “We looked at the picture on the wall,” but not “We watched the picture on the wall.”