From the linked EU memo in the YouTube description:
<a href="https://ec.europa.eu/commission/presscorner/detail/en/MEMO_17_17" rel="nofollow noreferrer">https://ec.europa.eu/commission/presscorner/detail/en/MEMO_1...</a><p><i>Can users still use ad blockers?</i><p><i>The proposal does not regulate the use of ad blockers. Users have the freedom to install software on their devices that disables the display of advertisement. At the same time, the Commission is aware that 'free' content on the internet is often funded by advertisement revenue. Therefore, the proposal allows website providers to check if the end-user's device is able to receive their content, including advertisement, without obtaining the end-user's consent. If a website provider notes that not all content can be received by the end-user, it is up to the website provider to respond appropriately, for example by asking end-users if they use an ad-blocker and would be willing to switch it off for the respective website.</i>