Visits to the cinema are currently off the agenda of course but the Windmill Cinema have a programme of films that can be viewed via online streaming. For details of their current offering please see here: –
https://windmillcinema.co.uk/WindmillCinema.dll/Home

Theatre-going is also off limits for now but Chichester Festival Theatre have also put together a number of productions for streaming, full details of which can be seen here.