Zoho Webinar supports HD video (720p) by default for all users.
To maintain 720p quality, the following bandwidth is required:
Minimum 3 Mbps upload speed
Minimum 6 Mbps total (upload + download)
If a attendees' available bandwidth is low, video quality will be automatically reduced:
To 360p if bandwidth is moderate
To 180p if bandwidth is very low
Additionally:
Only two video feeds are supported in HD quality at a time
If there are more than two video feeds, remaining incoming videos will switch to 360p
If there are more than nine video feeds, all incoming videos will switch to 180p quality