Van is jerking when driving forward

The engine is hesitating (ranging of the RPM). And it just does it at idle and going forward. For example you can put it in drive and then it will start doing it (not pressing the gas at all). But you press the gas it doesn't do it at all then (so far no error codes either) at any speed, at least not yet anyway (praise the Lord). When going in reverse it operates just fine too.

If it's a vacuum leak why doesn't the check engine light come on like last time? Just asking. Oh, I forgot to mention this too; it may mean nothing but I might as well share this too. A lot of water seems to come out of the tailpipe more often than before too. Okay. I will keep you updated. Thank you for taking the time to answer my question(s).

Well, it's not a blown head gasket. No smoke out of the tailpipe just water etc.
I click the link you provided about that and there is no oil or anything leaking at all praise the Lord. But it still makes that sound I showed you in the video clip. Hmm, I didn't know that I thought for sure that vacuum leaks always set a error code.

I drove it today in fact trying to get to the repair shop but they wasn't able to get to it. And it runs smooth as butter when you step on the gas but when you stop at the light then it makes that sound like in the video. But the repair guy did have a chance to hear it and he said sounds like a vacuum leak to him as well. So I am glad I didn't throw away my receipt to the fuel pump and fuel filter etc. Well unfortunately that not much of a update but that's all I have at this time.

April 24th, 2021 Update: Well, I took my van in and they repaired it. Turns out it was a leak under the intake manifold. Unlike last time I forgot to ask what the vacuum gauge read this time. But I do have a question though. Is it normal to fix a vacuum leak under the intake manifold so fast (under 2 hours)? Thank the Lord it runs good now and it doesn't make that sound like it did the video clip. Here is the break down on what I was charged just so if someone needs to know or want to know etc: Test and repaired vacuum 1. Whatever that meant charge was zero. Vacuum hose 1 of those was $2.00. And the labor is what gets me every time. But I have to pay it because I can't reach it (wheelchair) etc. Anyway, labor was $100.00. Total was $103.00. That includes taxable amount ($2.00) and sales tax (0.18).

I didn't think they didn't remove the intake because that was pretty fast. And You're welcome for the update. I really like this website. It's always a big help. Well for me it has anyway.