The catalog is not loading
Reload the page once, then try the Movies or TV Shows link. If text loads but posters do not, the images may be arriving separately. If the interactive search fails, the ordinary catalog pages provide a second way to reach a title.
Search shows no results
Remove date, country and language restrictions, then try just the title. Add a year only when you need to distinguish productions. A cast search looks for a person; a title search looks for the production. Choose the mode that matches the words you entered.
Watch now opens an unexpected result
Check the title and year on the Zmov page, then check the selected viewing country. The link opens a JustWatch search for that title, where a similarly named production may also appear. Select the matching film or series before continuing.
The video buffers or has no sound
Playback takes place on the service you chose. Check its quality and audio controls, test a supported browser and compare the connection on another device. If the player has an automatic quality option, try it before insisting on the highest resolution. Change one setting at a time so the result is meaningful.
Your saved list disappeared
Check the browser profile and site address. Private browsing and cleared storage can also explain a missing list. Use a saved backup when you need to restore it; opening more title pages will not recreate earlier choices.