There are a number of ways that you can add effects to videos in Photoshop. One way is to use the built in filters that are available.
To do this, simply open up your video file in Photoshop and then go to the ‘Filter’ menu. From here, you can select from a variety of different filter options that will help you to achieve the look that you want.
Another way to add effects to videos in Photoshop is to use some of the plugins that are available. These can be found online and will often give you a much wider range of options when it comes to adding effects.
One final way to add effects to videos in Photoshop is to use layer masks. This allows you to selectively apply effects to certain parts of your video. For example, if you only want an effect to be applied to the background of your video, you can use a layer mask to achieve this.
All of these methods can be used to great effect when it comes to adding effects to videos in Photoshop. However, it is important to experiment and find the method that works best for you and your particular project.