Telegram Web has two ways to download videos. One is by the download button that is on the top bar (as shown in attachment 1). The second way is to go full screen, and click download button on Chrome's video interface (as shown in attachment 2). The first way works perfectly, but the second one shows an error (as shown in attachment 3).
Open any video in any chat, and try to download it both ways.
Telegram Web 1.48.2 Z, Chrome 102