I looked it up on Hymnary, and it looks like these are the English lyrics that have been set to this tune, by Frederick George Scott:

1
We hail thee now, O Jesus:
thy presence here we own,
though sight and touch have failed us,
and faith perceives alone.
Thy love has veiled thy glory
and hid thy power divine,
in mercy to our weakness,
beneath an earthly sign.

2
We hail thee now, O Jesus:
in silence hast thou come,
for all the hosts of heaven
with wonderment are dumb --
so great the condescension,
so marvellous the love,
which for our sakes, O Saviour,
have drawn thee from above.

3
We hail thee now, O Jesus:
for law and type have ceased,
and thou in each communion
art sacrifice and priest.
We make this great memorial
in union, Lord, with thee,
and plead thy death and passion
to cleanse and set us free.

4
We hail thee now, O Jesus:
for death is ever near,
and in thy presence only
its terrors disappear.
Dwell with us, sweetest Saviour,
and guide us through the night,
till shadows end in glory.
and faith be lost in sight.

uPDATE: I have the title now;

Title: TALYLLYN
Meter: 7.6.7.6 D
Incipit: 51765 17652 31271
Key: A♭ Major
Source: Welsh Traditional Melody.
Copyright: Public Domain
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I know this comes from the Welsh hymnal Canuen FFYDD,and I have a copy but it's over 1,000 pages thick.
While it comes from a Welsh hymnal that doesn't preclude its appearance in other non Welsh hymnals. I cant make out any words in the audio.

The recording is on Facebook posted by a Welsh church in 2018

https://www.facebook.com/Rhosygad/video ... 632243597/