This video features exercises which are recommended to help with sciatica. Don't do any that don't feel right to you, and also adapt as per any different instructions from a physiotherapist or doctor. This video is not medical advice.
(This video was recorded in 2020 when I had a few glitches with the tech! The video was based on information from the NHS website https://www.nhs.uk/live-well/exercise/exercises-for-sciatica/)