Why if I create a training GC doesn’t show the animation???
Currently, "crunch" doesn't have a working animated video, although it is listed as such on Garmin Connect Web - Crunch Animation
I've confirmed that all of these variations of crunch have working animations:
Suggest submitting a case to Garmin Product Support
Not sure why you don't see them. Working fine on my epix (Gen 2) watch. Can view directly on the watch, which is why I said "confirmed." This is known as "ON-SCREEN WORKOUT ANIMATIONS." I'm not talking about viewing on the app.
If you still cannot view on your watch - Why Am I Not Seeing Animated Workouts on My Garmin Watch?
Find!!!! It’s normal, animation available only for premade workout, not supported in create new workout
https://support.garmin.com/en-US/?faq=IPD6X8JSLBAUQOXvz7zBO6&identifier=780139&tab=topics

I create all my workouts using Garmin Connect Web as a strength workout.

Never had an issue viewing the animations on the watch doing it that way. Never tried creating a "custom" workout.
From my Chest/Shoulders workout today...