A few weeks I made a post about a site called We Are Teachers (https://at-udl.blogspot.com/2019/01/we-are-teachers.html). This site also created a post called Encourage Creative Movement in the Classroom with Free Wellness Way Printables (https://www.weareteachers.com/wellness-way/). Check these options out for great activities for your students.
GoNoodle (https://www.gonoodle.com/) is a great site that has videos that can be used to boost productivity, improve behavior and build community. Check out all of their great videos and take a look at their Blog (http://blog.gonoodle.com/) for even more wonderful activities as well.
Yoga is a great calming movement activity.
Cosmic Kids Yoga (https://www.youtube.com/user/CosmicKidsYoga) is a great YouTube site full of fun yoga videos for kids. There are some short 1-2 minute videos that show you and your students how to do the poses. There are longer, 5-20 minute videos combining a series of poses that can be used for Brain Breaks or a short recess. There are also some 30-60 minute videos (the Saturday morning series) that might be great for a longer indoor recess time.
These are just a few options that you could use for indoor recess, brain breaks or other individual or all classroom movement times. Check them out and give them a try.