Your question is about distinguishing creakyness and glottal stop. If you have a look
here , one of the given examples is the Danish
stød, defined as a kind of
creaky voice (laryngealization), that
may also be realized as a glottal stop, above all in emphatic pronunciation". So phonetically the glottal stop consonant and the creaky prosodic feature can result in utterances close to each other.
I also hear a glottal stop at the end of the syllables spelled out by the burmese speaker on Youtube, but I think spelling out a syllable separatedly and pronouncing it in a speech act 'sandwiched' between other syllables is quite different. Generally the Burmese creaky tone sounds to me a bit higher than the checked (stopped) tone and shortly pronounced unlike the speaker enumerating the letters in order to make them as clear as possible. I've also listend to the Myanmar Basis.Episode I on the same page : From about 5 min. after the beginning of the video the speaker pronounces the letter
က with its name
ကြီး , the creaky tone is followed by a plain high pitch and I don't hear any glottal stop between both syllables. It's also interesting to hear ( 12 or 13 min. ) what he says about the three tones and how he tries to transcribe them. His lecture could be clearer

, but anyhow he shows that tones can be expressed differently from one to another person.
I'd like add J.Okell's remarks about tones in Burmese. J.Okell , now retired, was for many years a lecturer at the SOAS ( University of London ) and published various books on Burmese language ( Northern Illinois University ) . These are some of his explanations :
- What matters is that a high -pitch syllable must start high - which means higher than any neighbouring low-pitch syllables. Similarly, a low-pitch syllable must start lower that any nearby hights. Which way they go after they've started is not critical, as it is in tone languages like Thai and Chinese. ( Note at the beginning of his course ).
- (A the end of An introduction to the Script ) :
The three tones : I- အ၁့ High pitch spoken
with a tightened throat : creaky high tone
II- အ၁ Low pitch : low tone
III- အ၁း High pitch spoken with normal or relaxed throat : plain high tone
There are two other kinds of syllables. Though they don't have a place in the three-way contrast just described,
they are often referred to as tones, and are listed here for completedness:
I- အတ် High pitch followed by a glottal stop, called a "stopped" syllable
II- အ Low pitch, only on the vowel a, called a "weak" syllable. Also called "reduced" or "unstressed" syllable
( Bold type from myself )
Hope it helps.