On a phone, open the menu for the catalog sections and use search when typing a specific title is quicker than scrolling. Filters can narrow a long list. A tablet or desktop gives you more room to compare posters, but the title, year and cast remain the useful decision points.
Smart TV
Choosing on a phone and then opening the selected service's supported TV app is often easier than typing with a remote. Television browsers vary in navigation and playback support. Being able to open a webpage is not proof that every external player will work in it.
Desktop and external displays
Check which screen and speakers are selected before a long session. If video and audio appear on different devices, fix the output selection in the viewing app or device settings. Repeating the search will not change it.
Console viewing
Use the apps and browsing features supported by your console. There is no separate MovieFlixer console application here. Your local Watchlist also belongs to the browser where you made it; use a list backup when you want those choices elsewhere.