It depends. If you participate in a webinar or other online CPD activity in real time, or view it as part of an interactive discussion group or similar, there is no limit to how many units you can undertake in this format.
However, if you view or listen to any CPD activity on your own, this activity is classed as private study of audio/visual material and a maximum of 5 CPD units applies.
For the 2019/20 and 2020/21 practising years, the cap on private study of 5 hours has been removed due to face-to-face CPD events being cancelled and the need to practise social distancing and/or working remotely due to COVID-19.