OKX - Is this sus?

Hello TB, Are these red flags or am I overthinking? A recruiter from OKX posted in a marketing Slack group. They listed a few positions and advised interested parties to apply or email them. 1st potential red flag: the email address domain was '@okxgroup.online' vs. '@okx.com' I reluctantly sent an email and after a few brief email exchanges, I was advised to download and install https://mindconferences.io/ to schedule a time and meet using this app. This is the 2nd potential red flag as I find it highly unusual to have to download a non-mainstream video conferencing app to chat. Does anyone have any experience with hiring at OKX? Thoughts? Any insight would be helpful! Thanks! TC - O #OKX