different gateways for voip and http/other

RouterOS General
1

I have connection to local ISP that’s good enough for browsing and I pay flat rate. I also have LTE modem that I pay per the GB. All routed by microtiks. The ISP is no good for video or voip calls (jitter, latency) while the LTE does it without problems.

At the moment when I need to do video call I’d switch the default gateway from the ISP to the LTE. Once the call is over, revert back to the ISP. I could make that bit more intelligent and assign proper gateway to the different devices, based on their use (e.g. work laptop / reading ipad) but I’m wondering if anyone managed to do this based on protocol and/or port numbers.

Problem is many tools are used for videocalls — fb messenger, whatsapp, then all sort of corp biz tools — zoom, ms teams, etc. and I haven’t managed to build proper mangle tools to identify them correctly.

2

Yeah that would appear to be a nightmare.
Truth be told I would handle this manually.
Each desk has a 5 port managed switch and have people change their ethernet cable based on usage.
Video switch to ether 5, Non-video ETHER2 (assuming ether1 is used to main router and carries all the vlans).

Thus have one subnet (vlan) get internet from LTE and another subnet different vlan get internet from other ISP.
Set it up in routes, with route rules, no mangling required.