Start with the visit you want to spend time on
Choose the pond and religious sites if those are your main interests, or make the zoo the reason for the visit if animals matter most. Then keep only the additional stops that you still want to make, rather than trying to complete every place in a video.
The Tokyo Metropolitan Government lists Ueno Park (上野恩賜公園) as open from 05:00 to 23:00, with entry prohibited outside those hours. Use that as the park’s outer time boundary, and plan any hall, shrine or zoo entry around that facility’s own hours.
Write down one priority, the facilities you want to enter and the money you are willing to spend. If you skip the zoo, keep the pond or a selected religious site as the focus instead of treating the shorter plan as unfinished.