There seems to be some confusion between Home Sharing and syncing movies or TV shows from your Mac to your iPhone or iPad using Finder. These are two different processes, and understanding the distinction is important
1. Home Sharing – Streaming videos from your Mac
When you import your personal video files into the Home Videos category in the Apple TV app on your Mac, you can access and play those videos on your iPhone or iPad using Home Sharing, provided the required settings are configured and all devices are connected to the same Wi-Fi network.
In this arrangement, your iPhone or iPad streams the videos from your Mac. The videos are not automatically copied to your iPhone or iPad for offline viewing. Your Mac must be switched on, awake, and available on the network for streaming to work.
Therefore, Home Sharing allows you to access and watch your Mac's video library without having to store another copy of every video on your iPhone or iPad. However, you cannot rely on this method to watch those videos when your Mac or network is unavailable.
2. Finder – Syncing selected movies and TV shows to your iPhone or iPad
On the other hand, you can still sync movies and TV shows from your Mac to your iPhone or iPad using Finder. This allows you to keep selected videos on your device for offline viewing.
Apple's documentation explicitly states that you can select individual movies and TV shows to sync rather than syncing the entire collection. You can also configure automatic inclusion of recent or unwatched content, where those options are available.
Consequently, the statement that you must transfer all your movies and TV shows or none of them does not describe the full range of Finder's syncing capabilities.
If you are no longer seeing the option to select individual movies or TV shows, you should investigate the available syncing settings rather than assume that Apple has removed this capability.
3. Read Apple's official documentation
Please read the following Apple Support articles carefully to understand the procedures, requirements, and limitations:
These articles explain the difference between streaming media from your Mac and actually syncing media to your device. They also describe how to configure syncing over Wi-Fi after the initial setup.
In summary: Home Sharing lets you stream videos from your Mac, whereas Finder lets you sync selected videos to your iPhone or iPad for offline playback. If your concern is that Finder no longer displays the option to select individual movies or TV shows, please explain which macOS version you are using and what you see under the Movies and TV Shows tabs when your iPhone or iPad is selected in Finder. That will help identify the specific issue.