Hazel Crossley a former NHS OT has made several short videos on pacing: https://m.youtube.com/channel/UCXOGcuWK-EbiedtjXaT8VWA
Series of videos from Sheffield Hallam CRESTA team
Video 1 – https://youtu.be/CIpXGB-8DWI An introduction to the CRESTA team and fatigue
Video 2 – https://youtu.be/hIGYdjcZi7M Managing your energy and daily activity
Video 3 – https://youtu.be/nIcOVUqQMfI Looking after yourself during your recovery
Video 4: – https://youtu.be/HNFfrVUpdK0 Activity and fatigue
Video 5: – https://youtu.be/6FueYwVeI3w Question & Answer session on common issues for Covid-19 recovery
I found this book very helpful:
Classic Pacing for ME by Ingeborg Dahl
Physios4ME have useful info, including a video on using HR monitoring to avoid PEM and fatigue: https://www.physiosforme.com