Hi,
you need to use "your" User Agent paramter and some paramters after f4m link (read webconsole).Example below...
Code:
streamlink --http-header "User-Agent=Mozilla/5.0 (Windows NT 6.1; rv:56.0) Gecko/20100101 Firefox/56.0" "hds://https://web-wat-ssl.tf1.fr/2/USP-0x0/04/68/13490468/ssm/13490468.ism/13490468.f4m?vk=MTM0OTA0NjguZjRt&st=*&e=*" best
For the * enter your datas or use the entire link you got.If you did something wrong then you get status "403 Forbidden" as response.If you do it right then the stream starts to play in VLC.
Au revoir & greetz